Development Characteristics of Fractured Horizontal Wells in Spatiotemporally Heterogeneous Shale Volatile Oil Reservoirs

doi:10.7657/XJPG20260209

Abstract

Abstract:

Shale volatile oil reservoirs are characterized by small pore throat sizes and complex fluid properties, which compromises the accuracy in predicting reservoir development performance. Conventional prediction methods usually yield the results that are inaccurate or inconsistent with field conditions, since they only take into account a single factor or a few factors. Currently, the main controlling mechanisms in fractured horizontal well development of shale volatile oil reservoirs remain unclear. In this paper, a numerical simulation model based on discrete fracture network (DFN) was built to clarify the influences of multiple mechanisms, including nanopore confinement effect, and spatiotemporal heterogeneity of reservoirs. It is found that the pore throat size controls the development effectiveness mainly by influencing reservoir permeability, and its resulting fluid confinement effect has a relatively small impact on development. The stress-sensitive effect is an adverse factor for the development of shale volatile oil reservoirs. Fractures with high conductivity are conducive to the development of such reservoirs.

Key words: shale volatile oil, fractured horizontal well, confinement effect, stress sensitivity, development characteristic

CLC Number:

TE34

JIANG Liwu, DIWU Pengxiang, CHENG Chunjie, LIU Jinju. Development Characteristics of Fractured Horizontal Wells in Spatiotemporally Heterogeneous Shale Volatile Oil Reservoirs[J]. Xinjiang Petroleum Geology, 2026, 47(2): 201-209.

Figures/Tables 9

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Table 1.

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油藏孔喉半径/nm	不同分区流体模型对应孔喉半径/nm
>100	体相流体
30~100	100
15 nm~30	30
10~15	15
≤10	10