Characteristics and Main Controlling Factors of Chang 2 Reservoir with Low Stable Production and High Water Cut in the Xiasiwan Oilfield, Ardos Basin

YUAN Guangjin; XING Fen; GAO Qian; LIU Bingxi; ZHANG Chongyan; HE Zhiliang

Northwestern Geology > 2017 > 50(4): 200-208.

YUAN Guangjin, XING Fen, GAO Qian, et al. Characteristics and Main Controlling Factors of Chang 2 Reservoir with Low Stable Production and High Water Cut in the Xiasiwan Oilfield, Ardos Basin[J]. Northwestern Geology, 2017, 50(4): 200-208.

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Characteristics and Main Controlling Factors of Chang 2 Reservoir with Low Stable Production and High Water Cut in the Xiasiwan Oilfield, Ardos Basin

1. Shaanxi Yanchang Petroleum(Group) Co. Ltd., Yan'an 716000, Shaanxi, China;
2. Digital Oilfield Institute, Chang'an University, Xi'an 710054, Shaanxi, China;
3. School of Earth Sciences and Resources, Chang'an University, Xi'an 710054, Shaanxi, China;
4. School of Environmental Engineering and Water Resources, Chang'an University, Xi'an 710054, Shaanxi, China

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Received Date: June 30, 2017
Revised Date: August 17, 2017
Available Online: July 28, 2022
Published Date: December 04, 2017

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Abstract

Abstract

This thesis has researched the reason why Chang 2 oil-bearing formation has high water cut (approximately 90%)but has the main producing layers for more than 30 years in Xiasiwan,which cause our curiosity and attention. On the basis of the theory of the petroleum geology, the reasons for the Chang 2 has high water cut and low stable production have been discovered by using the theory and method of the advanced petroleum system and system science method, carrying out the related geology investigations, analyzing and studying the conventional thin sheet and casting thin sheet technology. The results show that the Chang 2 high water cut reservoir in Xiasiwan Oilfield has five geological causes, including the natural fracture system cause, porosity cause, permeability causes, hydrocarbon closure cause and formation water cause.According to faces-potential-source coupling, the source of Chang 2 still comes from Chang 7.The Xiasiwan oilfield is near the heart of the lake, which caused the stable mechanism of oil supply and accompanied by the factors of sedimentary facies and structural characteristics.Thus, the special reservoir system of high water cut and low stable production in Chang 2 reservoir has been brought up, which has been controlled by the faces-potential-source coupling.
- Ardos basin,
- Chang 2 reservoir,
- high water cut and petroleum-bearing system

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Characteristics and Main Controlling Factors of Chang 2 Reservoir with Low Stable Production and High Water Cut in the Xiasiwan Oilfield, Ardos Basin

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Characteristics and Main Controlling Factors of Chang 2 Reservoir with Low Stable Production and High Water Cut in the Xiasiwan Oilfield, Ardos Basin

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