透镜状薄层底水油藏水平井长度的研究及应用

Abstract

Abstract:

The reasonable length of horizontal wells for lens-like thin-layered bottom-water reservoirs has been a question, and there were limited studies in the literature. Aiming at the study of a specific low amplitude, moderate-high permeability, thin lens-like sandstone reservoir with bottom-water in Hutubi river layer in Luliang oilfield of Xinjiang, by using a variety of methods in geology, drilling, reservoir engineering and numerical simulation, and combined with the effects of horizontal wells during the reservoir development, we demonstrated the relation respectively between various factors of horizontal well length and wellbore pressure loss, reservoir adaptability, and development of oil drilling rate effects of such reservoir. Then, we proposed the range of the reasonable length of horizontal wells considering both theoretically and practically. The results showed good reliability and applicability, providing technical reference for the research and application of horizontal wells in similar bottom-water reservoirs.

Key words: thin-layered, lens-like, moderate-high permeability, sandstone bottom-water reservoir, horizontal well length

CLC Number:

TE243

Wang Jingpeng,Cao Wenjiang,Shi Yi,Fan Xibin,Qiu Zigang. Study and application of length of horizontal wells in lens-like thin-layered bottom-water reservoirs[J].Reservoir Evaluation and Development, 2018, 8(6): 62-69.

Figures/Tables 9

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References 18

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水平段长度/m	水平段油层钻遇率,%
150 ~ 200	94.9
200 ~ 250	96.2
250 ~ 300	95.9
300 ~ 350	97.1
>350	88.9

水平段长度/ m	水平段高阻层长度百分比, %	水平段高阻层长度/ m
150~200	53.5	94
200~250	55	119
250~300	58.2	159
300~350	57.5	181
>350	31.2	150

地质、开采因素	方法或地质特征	水平井长度界限或范围/m
井筒压力损失	Dikken等人	<500
油层适应性	一类、二类部署区底水厚度小于1m	200 ~ 300
	一类、二类部署区底水厚度大于1m	300 ~ 400
	三类部署区	200 ~ 350
钻井及油层钻遇	油层钻遇率	<350
钻井及油层钻遇	确保水平段足够的高阻层分布长度	200 ~ 350
实际开采效果	I类底水	300 ~ 350
实际开采效果	II、III、IV类底水	200 ~ 300

Study and application of length of horizontal wells in lens-like thin-layered bottom-water reservoirs

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