Jingshou Liu

China University of Geosciences · School of Earth Resources

Lower order faults (LOFs) are characterized by small‐scale, strong concealment and difficult to identify in seismic data, which affects the accuracy of LOF interpretation. Due to the quality of the seismic data in the M35 fault block of the Gaoyou sag, Subei basin, the direction of the LOFs cannot be accurately identified, leading to the unclear re...

To ensure the effectiveness of fracturing treatment and improve the production reserves of individual wells, it is important to accurately predict the in situ stress distribution to prevent the collapse of horizontal wells. From the perspective of reservoir development, under similar structural environments, microscopic factors, such as reservoir a...

Fractured reservoirs account for more than one-half of the global oil and gas output and thus play a pivotal role in the world’s energy structure. Under diagenesis, rocks become dense, and tectonic fractures easily form under subsequent tectonic movement. These tectonic fractures are the main seepage conduits of tight sandstone reservoirs and are i...

A transfer zone is a kind of structure that is produced to conserve deformation of a fault structure on both sides. Increasing numbers of transfer zones are being identified in rift basins, which are areas of petroleum accumulation and potential exploration targets. This paper provides a numerical simulation method for the genesis and development o...

Hydraulic fracturing technology is relatively mature in North America, but under complex geological conditions, such as those in China, the application of this technology still faces great challenges. At present, techniques for the numerical simulation of hydraulic fracture networks are mainly based on the prediction of the fracture half-height and...

With the development of shale gas exploration in China, the use of conventional logging tools has been introduced, and cross multipole array acoustic logging tools have gradually been used to determine the stress orientation in shale. The direction of fast shear waves (FSWs) is generally parallel to the horizontal maximum principal compression stre...

The distribution of lower-order faults affects the development of oil and gas and the distribution of remaining oil, which is also the key to the development of fault block reservoirs in eastern China. The lower-order faults are characterized by short extension, small fault displacement, and difficult identification by traditional seismic interpret...

KEYWORDS reservoir geomechanics, in situ stress, reservoir fracture, rock mechanics, unconventional reservoir Editorial on the Research Topic Unconventional reservoir geomechanics Unconventional resources, which can be regarded as an alternative for the conventional resources, have been a hot Research Topic over the past decades. Many countries, in...

The Gas field L at the scale of 100 billion square meters is a huge Miocene gas field discovered in the Yinggehai Sag of Yinggehai Basin. The Miocene strata of its gas-bearing horizon system are typical low-permeability sandstone strata, which underlie the quantitative prediction of stratum fractures and the subsequent exploration and development....

Mechanical stratigraphy can provide valuable knowledge for evaluating and predicting the distribution of structural fractures and in situ stress. The fracture stratigraphy and mechanical stratigraphy of the Triassic Yanchang Formation sandstone reservoirs in the Huaqing area of the Ordos Basin were investigated. In this study, borehole images were...

The rock mechanical stratigraphy controls the development degree and genetic mechanism of natural fractures. Similarly, the development of fractures also affects the size and anisotropy of rock mechanical parameters. Affected by diagenesis and tectonics, the rock mechanics layer has migrated. Therefore, the rock mechanics layer that controls the de...

莺琼盆地中新统是油气勘探开发的重点层系,但海上区块深层储层取心极少,岩石力学参数研究较为薄弱。针对这种现状,文章基于声波全波列测井曲线,计算岩石动态力学参数;利用全岩矿物、物性分析以及压汞实验资料,分析岩石力学参数的影响因素。结果表明:研究区中新统储层杨氏模量介于20～50 GPa之间,泊松比介于0.1～0.35之间,内摩擦角介于20°～35°之间,抗张强度介于5～30 MPa之间。横向上,同一层位各岩石力学参数之间具有非均一性;垂向上,岩石力学参数与埋深呈弱正相关性。影响因素分析表明,岩石孔隙度、粘土矿物含量、脆性矿物含量以及孔隙半径影响岩石力学参数大小。研究成果一方面为该区地应力场模拟、储层裂缝评价以及目的层压裂优化设计提供了可靠的基础数据;另一方面,为衔接深部储层地质参数与地质力学参数...

The mineral components play an indispensable role in shale reservoirs, and the study of their content and character are significant for the permeability impairment rate and stress sensitivity of shale reservoirs. In this study, the shale cores from the FC1 well of the Lower Cambrian Niutitang Formation in northern Guizhou were used to analyze the m...

There is an important relationship between in-situ stress and reservoir quality, in order toto innovate the theoretical understanding and technical methods of reservoir evaluation from the perspective of in-situ stress. Based on the rock mechanical test and logging data, combined with regional evolution and structural deformation, this study carrie...

Hydraulic fracturing and horizontal well technology can effectively improve reservoir production but can affect reservoir reconstruction through many factors, including the reservoir lithology, reservoir stress state and natural fractures. Considering tight sandstone as an example, the finite element method (FEM) and the optimal trajectory design s...

The increasing complexity of reservoirs, particularly shale reservoirs, demands accurate information on the formation composition, mineralogy, and mechanical parameters for effective exploitation. The development of geochemical and geophysical logging technology allows the investigation of the correlations between the elemental, mineral contents, a...

Fracture aperture is the main source of uncertainty in reservoir fracture modeling; this uncertainty is due to the difficulty of accurately quantifying underground fracture aperture and the limited understanding of the main factors controlling fracture aperture and the mechanical deformation process. The theoretical evaluation model of underground...

Brittleness parameter is one of the important sensitive parameters of the evaluation of well completion quality in the“three quality”evaluation of tight oil.The triaxial rock mechanical experiment was conducted and based on the characteristics of rock failure and energy evolution in process of the rock failure,the brittleness index calculation meth...

Understanding existing fractures is critical to achieving high and stable yields in low‐permeability reservoirs, tight sandstones, and shale reservoirs. When multiple fracture sets are present in a reservoir, accurately determining the seepage direction of fluids is critical for the deployment of the well network, fracture reformation, and the desi...

Fractured oil and gas reservoirs occupy an important position in world's oil and gas output and reserves. On the one hand, natural fractures can significantly improve the reservoir permeability, they can even provide some storage space for oil and gas accumulation. On the other hand, they are important effects of reservoir fracturing and petroleum...

The Lower Paleozoic Silurian Longmaxi Formation shale in the Sichuan Basin of southern China has achieved commercial exploitation in recent years, and has become a rapid growth point in China's oil and gas reserves. However, the Longmaxi Formation on the peripheral margin of the Sichuan Basin has not made substantial progress. Fractures, that as fl...

Of the characteristics of tight sandstone reservoirs, heterogeneity is one of the most difficult characteristics to analyze. Heterogeneity is mainly manifested in three properties: lithology, porosity and electricity. The Chang 7 reservoir in the Dingbian oilfield is a tight sandstone reservoir controlled by delta front deposits. In this sedimentar...

The pore structure and fractal characteristics of the Lower Cambrian marine organic-rich shale in southern China were comprehensively studied using low-pressure [Formula: see text] adsorption and organic geochemical experiments, X-ray diffraction, petrophysical property tests, and scanning electron microscope observations. The results indicate that...

Low-permeability reservoirs are characterized by poor physical properties, strong heterogeneity and natural fractures. Accurate identification of the fracture distribution is of great significance for the exploration and development of low-permeability reservoirs. Field outcrop, core and imaging log analyses show that stratabound vertical and high-...

Using numerical simulations of the paleostress field during the time of fracture formation, we predict the occurrence of fractures in the reservoirs of the second member of the Funing Formation in the Tongcheng fault zone, Subei basin, East China. We use sonic velocity measurements from rock cores and microseismic monitoring to determine the in sit...

The rocks with low permeability have a strong sensitivity to pressure. By changing the size of confining pressure, we can realize the effective stress change of rocks and calculate the permeability change under different effective stress to evaluate the stress sensitivity of the reservoir. We analyzed the factors affecting the stress sensitivity of...

The study analyzed the shale fracture characteristics,controlling factors and differences of fractures developed in marine and continental shales in the second Member of the Lower Cambrian Bianmachong Formation(C1b2) based on fracture observation and experimental data.The results show that the C1b2 shales show certain features of both marine and co...

In this paper, the analysis of faults with different scales and orientations reveals that the distribution of fractures always develops toward a higher degree of similarity with faults, and a method for calculating the multiscale areal fracture density is proposed using fault-fracture self-similarity theory. Based on the fracture parameters observe...

The great potential that southern China has for marine shale gas resources is well known, yet shale gas production is very small. Exploration and development of southern China has lagged because of the complicated structural history of this region. Thus, it is important to recognize the tectonic history of this region and to carefully describe the...

The mechanical parameters of shale are some of the most significant assessment indices for shale gas exploitation. The development of element logging offers an opportunity to study the correlations between the elemental concentrations and the mechanical characteristics of shale. Using the Lower Cambrian shale in the Cen'gong area, Guizhou Province,...

The marine shale gas in South China has great exploration potential, and exploration in the Sichuan Basin has been successful, but the degree of exploration is low in Guizhou Province. We used organic geochemical analyses, X-ray diffraction (XRD) analysis, and CH4 adsorption experimental methods to study pore structures and their effects on the met...

Industrial levels of shale gas have been produced from the Niutitang Formation in the lower Cambrian of the Cen'gong block, South China. The practice of exploration and development of shale gas in the Cen'gong block shows that the abundance of gas in different layers and wells is closely related to the degree of development of fractures. In this st...

An analysis of the in-situ state of stress in a shale reservoir was performed based on comprehensive information about the subsurface properties from wellbores established during the development of an oil and gas field. Industrial-level shale gas production has occurred in the Niutitang formation of the lower Cambrian Cen'gong block, South China. I...

Reservoirs where tectonic fractures significantly impact fluid flow are widespread. Industrial-level shale gas production has been established from the Lower Cambrian Niutitang Formation in the Cen'gong block, South China; the practice of exploration and development of shale gas in the Cen'gong block shows that the abundance of gas in different lay...

It has been difficult to approach an accurate and quantitative characterization of the evolution of tectonic fracture attitudes. By defining the mechanical properties of fracture and the mechanics parameters of rocks, and on the basis of restoration of the paleo-tectonic morphology, an optimal failure criterion has been selected after the numerical...

Aiming at difficulties to quantitatively predict fracture permeability tensor, present fracture occurrence was predicted based on occurrence change of rock mechanical layers. Present liner density of fracture was predicted based on the facture surface energy theory and the rock strain energy theory of fracture mechanics. According to the results of...

Hydrocarbon migration and accumulation have close relationships with the distribution and developing degree of faults in the Jinhu Sag. In order to understand hydrocarbon distribution patterns and the control action of faults on hydrocarbon enriching degree in faulted areas,fractal theory was applied to study the fault system in Jinhu Sag,and the d...

According to the fact that Minqiao oilfield is of simple structure and more faults, the fracture distribution in its reservoir is pre• dicted by means of fault capacity dimension and information dimension method, the prediction result is compared with the result of numeri• cal simulation of structural stress field. The result shows that Minqiao oil...

To accurately orient the core fracture of deviated boreholes, the research thought and corresponding algorithm was proposed based on attitude of rocks and dip-logging method, and then applied to the observation data of core fracture of Tian-33 fault block. The actual attitude of fracture can be obtained only through hole-deviation correction. Befor...