STUDY ON SEEPAGE CHARACTERISTICS OF TIGHT RESERVOIRS UNDER MULTI-FIELD COUPLING

ZENG Zhiping; WANG Qianjun; LI Jing; FAN Jie; WANG Hao; LIU Chen

doi:10.12090/j.issn.1006-6616.2019.25.06.089

Volume 25 Issue 6

Dec. 2019

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ZENG Zhiping, WANG Qianjun, LI Jing, et al., 2019. STUDY ON SEEPAGE CHARACTERISTICS OF TIGHT RESERVOIRS UNDER MULTI-FIELD COUPLING. Journal of Geomechanics, 25 (6): 1068-1074. DOI: 10.12090/j.issn.1006-6616.2019.25.06.089

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STUDY ON SEEPAGE CHARACTERISTICS OF TIGHT RESERVOIRS UNDER MULTI-FIELD COUPLING

doi: 10.12090/j.issn.1006-6616.2019.25.06.089

ZENG Zhiping^1
,,
WANG Qianjun¹,
LI Jing^{2
,
,},
FAN Jie^{1, 3},
WANG Hao²,
LIU Chen²

1.
Research institute of exploration and development of Shengli Oilfield, Sinopec, Dongying 257015, Shandong, China
2.
Research Institute of Geological Mechanics and Engineering, China University of Petroleum, Qingdao 266580, Shandong, China
3.
Working Station for Postdoctoral Scientific Research, Shengli Oilfield, Dongying 257000, Shandong, China

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Received: 2018-09-15
Revised: 2019-07-24
Published: 2019-12-31

Abstract

Abstract

Seepage characteristics of tight sandstone are of great significance for tight reservoir evaluation and exploitation. The fluid-solid-heat coupling control equation was built, and the COMSOL Multiphyics software was used to carry out a numerical simulation study for the distribution law of fluid seepage velocity and formation pore pressure under different production time in a 3D tight reservoir in No.4 block of central Dzungaria Basin. The results are as follows:(1) The maximum values of fluid seepage velocity appeared in the wellhead and its surrounding areas, and the velocity of fluid seepage in the transition zone of fault breakage was higher than that in the surrounding continuous formation and nuclear part of the fault. (2) With the increase of the distance from the wellhead, the variation of fluid seepage velocity changed from increasing first, then decreasing, and finally tending to be stable to gradually increasing first, then gradually tending to be stable. (3) In the initial stage of production, the pore pressure isobar was located around the wellhead, distributed with circular line and then the low stress zone extended along the direction of the fault. (4) The pore pressure was decreasing as the production time increased, at the same time, the farther from the wellhead, the larger the pore pressure was and the smaller the decrease amplitude was. The research results provide technical support for the correct prediction of development and production indexes and improvement of exploration and development effect of tight oil and gas.
- multi-field coupling,
- tight reservoir,
- seepage characteristics,
- pore pressure

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STUDY ON SEEPAGE CHARACTERISTICS OF TIGHT RESERVOIRS UNDER MULTI-FIELD COUPLING

doi: 10.12090/j.issn.1006-6616.2019.25.06.089

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STUDY ON SEEPAGE CHARACTERISTICS OF TIGHT RESERVOIRS UNDER MULTI-FIELD COUPLING

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