... Abstract Gulong shale oil is characterized by abundantly enriched nanopores and bedding fractures. A critical challenge of shale oil reservoir simulation is the representation of complex cross-scale flows among tight matrix, bedding fractures and hydraulic fractures, which require fine gridding...

... concentration optimization performance requirement drilling fluid management & disposal separation and treating oilfield equipment variable pitch hydrocyclone stainless steel propagation complex reservoir reservoir characterization clastic rock hydraulic fracturing horizontal fracture...

... by the high risk of instability associated with a few shaly intervals in the overburden build section which have been known to cause serious wellbore instability-related problems. In the reservoir, the presence of natural fractures narrows the safe mud weight window due to the high collapse pressures of shale...

... Abstract Shallow shale gas reservoirs in mountainous terrains are influenced by "low formation pressure, significant variations in burial depth, steep formation dips, and the presence of fractures and microstructures", posing challenges in aligning well types and development strategies...

... Abstract The study and assessment of flow conductivity within infilled-shear fractures play a pivotal role in guiding the development of shale gas resources. This paper presents an investigation using shale reservoir rock samples from the Longmaxi Formation. We employed a novel infilled-shear...

... multi-phase displacement process in a practical framework of flow simulations. In this study, we present an efficient workflow using an Embedded Discrete Fracture Model (EDFM) to simulate CO 2 flow via conductive faults and its application to the full-field scale assessment. The EDFM approach has been...

... Abstract Lost circulation pose a primary challenge in the exploration and development process. For the problem of Lost circulation in fractured formations, the addition of plugging materials with different functions and in specific proportions into the drilling fluid to seal the fractures...

... Abstract In-situ stress is generally regarded as one of the most crucial factors controlling hydraulic fracture characteristics. Fracture propagation is expected to be perpendicular to the minimal horizontal stress. However, microseismic monitoring results of deep shale gas reservoirs...

... Abstract Tight sandstone gas is the main gas source for increasing storage and production in Songliao Basin, China. Due to the deep burial depth, poor physical properties, and small pore throats of the reservoir, large-scale fracture network fracturing leads to uncontrolled fracture height...

... Abstract Hydraulic fracturing (HF) is an effective technology to develop tight oil & gas reservoirs, which is expected to achieve ideal production in reservoirs that would otherwise achieve little or no production. However, it is not uncommon that many of these fractured wells are not able...

... Traditional analytical well-testing methods are not applicable to fractured low-porosity sandstone reservoirs. Besides, numerical well-testing describing the transient pressure response of each grid cell at different moments, which makes the interpretation results more accurate and reliable...

... must be selected in such a way that it maintains the primary pressure barrier for well control while minimizing the fluid loss into the reservoir. Loss of workover fluid is a common and major challenge faced while workover of wells completed in reservoirs with natural fractures and depleted pressures...

... Currently, in numerical simulations of reservoirs, frequently employed mathematical models for describing fractures include the continuum model, dual-porosity model, discrete fracture model (DFM), etc. ( Kazemi et al. (1976) ; Rossen et al (1977 ); Lim & Aziz (1995) ; Quintard...

... fluid dynamics sedimentary rock upstream oil & gas clastic rock geologist fracture characterization drillstem/well testing fracture drillstem testing shale gas production monitoring united states government geological subdiscipline workflow complex reservoir hydraulic...

... Abstract Acid fracturing is an essential technology for the efficient development of oil and gas reservoirs containing carbonate. However, in the case of deep and ultra-deep marine carbonate oil and gas reservoirs, existing acid fracturing technologies are unable to create a complex fracture...

...Physical model Shale matrix consists of organic pores and inorganic pores, and it develops micro-fractures. After hydraulic fracturing, the reservoir forms multi-scale fractures, including laminated fractures and hydraulic fractures. Different-scale media, such as organic matter, inorganic...

... Abstract The use of volume-oriented completion and fracturing practice in Ordos Basin shale oil wells began in the mid-2010s, and it was effective in boosting productivity. However, recently, well performance has stopped improving and the engineering effort has increased, indicating...

...Model parameter settings Based on the characteristics of the ultra-deep fractured dense sandstone reservoir in Kucha, a base model for studying stress disturbance and natural fracture activation during fracturing was established to form a true 3D simulation method for fracturing the natural...

... Abstract An advanced numerical simulation method was developed to accurately characterize the heterogeneous geomechanical damage of heterogeneous matrix, hydraulic fractures, and natural fractures during production. The proposed model can automatically obtain the geomechanical damage correction...

... Abstract The Gulong shale oil plays is a shale reservoir characterized by well-developed fracture bedding planes. To study the distribution and evolution characteristics of Gulong shale oil, namely, the size of the oil-bearing pores, the content of oil in organic and inorganic pores...