Study on Interlayer Parameters of Bottom Water Heavy Oil Reservoir Under Single-well Condition

doi:10.11885/j.issn.1674-5086.2016.09.20.01

Abstract

Abstract: The main problem during the production of bottom water heavy oil reservoirs is the imbibition of the bottom water. The use of horizontal wells can effectively alleviate this production contradiction. At the same time, the existence of the interlayer can greatly reduce the rise of the bottom water, improve the recovery extent, and improve the recovery efficacy. This paper discusses the effect of the change of interlayer parameters on the production under the condition of a single well. There are many interlayer factors affecting the recovery efficacy. According to research, and considering the typicality and feasibility, three parameters, including the interlayer dimensionless area, interlayer dimensionless vertical position, and interlayer permeability, were selected for the study of the effect of interlayer parameters on production efficacy. Based on the actual parameters of the Bohai A reservoir, the numerical model of the bottom water heavy oil reservoir with interlayer was established. The production curve, water saturation rising curve, streamline field model diagram, and saturation field diagram were analyzed by the reservoir engineering method. The effect of each single factor on the production was studied:a larger interlayer corresponded to better production. The closer the interlayer is to the oil-water interface, the better the production is. The production in the case of an interlayer with low permeability is better than that in the case of a barrier. Based on the single-factor influence analysis, the orthogonal experiment was carried out, and the influence due to multiple factors was analyzed. The influence degree of the three interlayer parameters was determined. In decreasing order of influence, the parameters are:interlayer dimensionless area, interlayer dimensionless vertical position, and interlayer permeability.

Key words: bottom water, heavy oil reservoir, horizontal well, interlayer parameters, orthogonal analysis experiments

CLC Number:

TE345

HUANG Shijun, SONG Qianlan, CHENG Linsong, YANG Yang, ZHOU Zhonghao. Study on Interlayer Parameters of Bottom Water Heavy Oil Reservoir Under Single-well Condition[J]. 西南石油大学学报(自然科学版), 2018, 40(1): 130-140.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2016.09.20.01

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