A5066050203- Hydraulic Fracturing and Reservoir Analysis
- Hydrocarbon exploration and reservoir analysis
- Seismic Imaging and Inversion Techniques
- Drilling and Well Engineering
- earthquake and tectonic studies
- Rock Mechanics and Modeling
- Coal Properties and Utilization
- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Hydrology and Drought Analysis
- Reservoir Engineering and Simulation Methods
- Geoscience and Mining Technology
- Mineral Processing and Grinding
- Climate variability and models
- Geological and Geophysical Studies
- Plant Water Relations and Carbon Dynamics
China University of Petroleum, Beijing
2015-2024
Fractures are the main fluid-flow pathways in tight-oil sandstones, and they have a significant influence on distribution, exploration, development. Cores image logs commonly unavailable because of their high costs, so employing conventional for fracture detection is imperative sandstones. We compared fracture-response characteristics based two data sets, one from 8 cored wells with intensities greater than 1 m−1 (3.3 ft−1) other 11 less 0.5 (1.6 ft−1), case study Upper Triassic Yanchang...
Fractures are of great significance to tight oil and gas development. Fracture identification using conventional well logs is a feasible way locate the underground fractures in sandstones. However, there three problems affecting its interpretation accuracy practical application, namely weak log responses fractures, lack specific for fracture prediction, relative change omission responses. To overcome these improve accuracy, indicating parameter (FIP) method composed comprehensive index (CIM)...
Natural fractures are important storage spaces and fluid-flow channels in tight-oil sandstones. Intraformational open the major for fluid flow Small faults may provide across different layers. According to analogous outcrops, cores, borehole image logs, small intraformational developed sandstones of Upper Triassic Yanchang Formation southwestern Ordos Basin, China. Among them, high dip-angle most abundant. Northeast-southwest–trending principal because that is present-day maximum horizontal...
Analysis of natural fractures is essential for understanding the heterogeneity basement reservoirs with carbonate rocks since significantly control key attributes such as porosity and permeability. Based on observations analyses outcrops, cores, borehole image logs, thin sections from Mesoproterozoic to Lower Paleozoic in Jizhong Sub-Basin, are found be abundant genetic types (tectonic, pressure-solution, dissolution) these reservoirs. Tectonic dominant reservoirs, lithology, mechanical...
Waterflooding is an important functional process for low-permeability reservoir development. However, production practice shows that water breakthrough and floods along natural fractures are ubiquitous in reservoirs. Therefore, controlling the injection pressure to prevent effective measure improving waterflooding development effect. In this paper, approach proposed determining based on opening of fractured The pressures calculated by analytical method paper formation-parting compared...
Fault damage zones around faults have a significant influence on fluid flow in tight-oil sandstones because they commonly act as localized conduits. Faults are developed the of Upper Triassic Yanchang Formation southwest Ordos Basin, China. We integrate cores, image logs, and conventional logs from vertical wells to characterize subsurface fault The results indicate that intensively fractured or intensely broken cores. These present borehole collapse widen sinusoidal curves logs. fractures...
Elliptic borehole breakouts are usually used to determine the orientation of in situ stress deep sedimentary basins. The long axes generally perpendicular maximum horizontal principal compression (SHmax). However, azimuth is found chief strike (but not SHmax) natural fractures tight reservoirs, Anpeng field Nanxiang Basin, China. Based on core data and acoustic resistivity image logs, intensively striking at east-west where occurred north-south. If induced only by stresses surrounding well...
The Chang 8 Member of the Upper Triassic Yanchang Formation in southwestern Ordos Basin is a typical tight sandstone reservoir and has an average porosity 8.60% air permeability 0.20 mD. Multi-scale faults fractures are widely developed these reservoirs. In this study, three-dimensional seismic data, outcrops, cores, imaging logs, thin sections were used to classify at multiple scales. Combined with oil production influence multi-scale on enrichment was analyzed. results show can be divided...
Kernel Fisher discriminant analysis (KFD) can map well-log data into a nonlinear feature space to make linear nonseparable problem of fracture identification separable one. Commonly, KFD uses one kernel. However, the prediction capacity based on kernel is limited some extent, especially for complex classification problem, such as in tight sandstone reservoirs. To alleviate this we have used multiple (MKFD) method recognize zones. MKFD multiscaled Gaussian functions instead single realize...
Abstract The Upper Triassic Xujiahe Formation is a typical tight gas reservoir in which natural fractures determine the migration, accumulation and production capacity of gas. In this study, we focused on influences migration production. We clarified characteristics attributes (i.e. dips, apertures, filling degree cross-cutting relationships) based image logging interpretations core descriptions. Previous studies electron spin resonance, carbon oxygen isotopes, homogenization temperature...
Abstract The Sichuan Basin in south-western China is rich shale oil the Jurassic strata. Due to its complex geological characteristics, reservoir identification using current log-constrained seismic inversion methods difficult. Characteristics of reservoirs were tested on basis petrophysical experimentation core samples from said Thin sections and logging data analysis showed influencing factors characteristics clarified sensitive geophysical parameters for identification. Da'anzhai Member...