Review of multi-scale and multi-physical simulation technologies for shale and tight gas reservoirs

Wang, Lei; Wang, Shihao; Zhang, Ronglei; Wang, Cong; Xiong, Yi; Zheng, Xishen; Li, Shangru; Jin, Kai; Rui, Zhenhua

doi:10.1016/j.jngse.2016.11.051

Cited by 124 publications

(42 citation statements)

References 113 publications

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“…P wD boundary = P wD in f inite + P wD closed circular boundary (3) where P wD boundary means the pressure solution of an MFHW in circular-bounded formation.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…With the depletion of conventional oil/gas resources, tight oil and gas reservoirs have attracted great attention and become significant sources of hydrocarbon supply [1][2][3][4][5][6]. Multistage hydraulically fracturing treatments generate complex fracture networks, which enables commercial production from tight formations [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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An Improved Rate-Transient Analysis Model of Multi-Fractured Horizontal Wells with Non-Uniform Hydraulic Fracture Properties

Cheng

Rui

et al. 2018

Energies

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Although technical advances in hydraulically fracturing and drilling enable commercial production from tight reservoirs, oil/gas recovery remains at a low level. Due to the technical and economic limitations of well-testing operations in tight reservoirs, rate-transient analysis (RTA) has become a more attractive option. However, current RTA models hardly consider the effect of the non-uniform production on rate decline behaviors. In fact, PLT results demonstrate that production profile is non-uniform. To fill this gap, this paper presents an improved RTA model of multi-fractured horizontal wells (MFHWs) to investigate the effects of non-uniform properties of hydraulic fractures (production of fractures, fracture half-length, number of fractures, fracture conductivity, and vertical permeability) on rate transient behaviors through the diagnostic type curves. Results indicate obvious differences on the rate decline curves among the type curves of uniform properties of fractures (UPF) and non-uniform properties of fractures (NPF). The use of dimensionless production integral derivative curve magnifies the differences so that we can diagnose the phenomenon of non-uniform production. Therefore, it's significant to incorporate the effects of NPF into the RDA models of MFHWs, and the model proposed in this paper enables us to better evaluate well performance based on long-term production data.

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“…P wD boundary = P wD in f inite + P wD closed circular boundary (3) where P wD boundary means the pressure solution of an MFHW in circular-bounded formation.…”

Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Improved Rate-Transient Analysis Model of Multi-Fractured Horizontal Wells with Non-Uniform Hydraulic Fracture Properties

Cheng

Rui

et al. 2018

Energies

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“…As a result, mantle-derived CO 2 was able to migrate from the heat flow diapir upward along the volcanic conduit and accumulate in the volcanic reservoir. Without a fault to provide a migration path, hydrocarbon gases in the strata of the underlying Shahezi Formation could not accumulate in the reservoir body (Sun et al 2016;Wang et al 2017), which resulted in CO 2 contents as high as 70%-80% in wells Fs701, Fs9-1, and Fs9.…”

Section: Migration and Accumulation Modelmentioning

confidence: 99%

Origin, migration, and accumulation of carbon dioxide in the East Changde Gas Field, Songliao Basin, northeastern China

Liu

Yang

Rui³

et al. 2018

Pet. Sci.

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CO 2 reservoirs are widely distributed within the Yingcheng Formation in the Songliao Basin, but the extreme horizontal heterogeneity of CO 2 content causes difficulties in the exploration and exploitation of methane. Former studies have fully covered the lithology, structure, and distribution of the reservoirs high in CO 2 content, but few are reported about migration and accumulation of CO 2 . Using the East Changde Gas Field as an example, we studied the accumulation mechanisms of CO 2 gas. Two original types of accumulation model are proposed in this study. The fault-controlled accumulation model refers to gas accumulation in the reservoir body that is cut by a basement fault (the West Xu Fault), allowing the hydrocarbon gas generated in the lower formation to migrate into the reservoir body through the fault, which results in a relatively lower CO 2 content. The volcanic conduit-controlled accumulation model refers to a reservoir body that is not cut by the basement fault, which prevents the hydrocarbon gas from being mixed in and leads to higher CO 2 contents. This conclusion provides useful theories for prediction of CO 2 distribution in similar basins and reservoirs.Petroleum Science (2018) 15:695-708 https://doi.org/10.1007/s12182-018-0259-5( 0123456789().,-volV) (0123456789().,-volV)

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“…In the US, 51% of crude oil production and 67% of natural gas production came from the hydraulically fractured wells in 2015 [1][2][3]. To fracture the formation, a large volume of water is injected to create a fracture network that provides pathways for hydrocarbon to flow [4][5][6][7][8]. In recent years, fracturing experience from various fields indicates that the larger the volume of water used per well, the more complex the created fracture network, and thus the higher the initial hydrocarbon production rate [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Study on Fluid-Rock Interaction and Reuse of Flowback Fluid for Gel Fracturing in Desert Area

et al. 2018

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Hydraulic fracturing requires a large volume of fresh water, which is difficult and expensive to obtain in the desert area such as Tarim Basin. Currently, flowback fluid is typically transported to the sewage treatment plant and then discharged after reaching environmental requirements; however, this is not only costly, but also a waste of water resource. Therefore, it is imperative to understand the potential interactions between fracturing fluid and reservoir rock, and then find solutions to reuse the flowback water for subsequent fracturing. In this study, once flowback fluid was directly collected from the field, its chemical compositions were analyzed; then, filtering, decoloring, and chelating methods were chosen to effectively remove or shield the unfavorable reintroduced components. Moreover, pH value was further tuned during different stages of the recycling process to ensure good gelation and cross-linking properties of guar. Cross-linked guar synthesized with the flowback fluid was evaluated in the lab through shear resistance tests and coreflood tests under the reservoir conditions; results indicated the recycled gel behaved similarly as the original gel, or even better. From this work, a cheap and effective treatment process was proposed to reuse the flowback fluid in the desert area.

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Review of multi-scale and multi-physical simulation technologies for shale and tight gas reservoirs

Cited by 124 publications

References 113 publications

An Improved Rate-Transient Analysis Model of Multi-Fractured Horizontal Wells with Non-Uniform Hydraulic Fracture Properties

An Improved Rate-Transient Analysis Model of Multi-Fractured Horizontal Wells with Non-Uniform Hydraulic Fracture Properties

Origin, migration, and accumulation of carbon dioxide in the East Changde Gas Field, Songliao Basin, northeastern China

Study on Fluid-Rock Interaction and Reuse of Flowback Fluid for Gel Fracturing in Desert Area

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