苏里格致密砂岩气田效益开发技术对策研究

doi:10.13809/j.cnki.cn32-1825/te.2024.03.017

摘要/Abstract

摘要：

苏里格气田致密砂岩气藏的天然气储量规模和年产气量目前都位居中国第一。随着开发不断深入，气田储量品质劣质化及未动用储量碎片化趋势明显，增加了未来效益开发的不确定性。为确保气田致密砂岩气藏的可持续效益开发，基于深化气田开发过程中所获得的地质与气藏工程认识的基础上，梳理了影响气田效益开发的影响因素，建立了该气田效益开发的技术对策。研究结果表明：①基于以经济产量为中心的评价模型对气田各区块经济效益进行实证分析，可以评价气田目前整体效益开发现状，指导未来整体开发方向；②为了支持气田致密气产业进一步发展，根据气田各区块效益评价，从地质和气藏工程的角度去寻求有效开发的配套措施，分类治理，分类施策，进而形成苏里格气田效益开发技术对策，实现气田持续经济有效开发。

关键词: 苏里格气田, 致密气, 无阻流量, 内部收益率, 效益开发

Abstract:

At present Sulige Gas Field holds the distinction of being the largest in terms of natural gas reserves and annual production among tight sandstone gas reservoirs in China. However, as development progresses, there is a noticeable decline in the quality of gas field reserves and an increasing fragmentation of untapped reserves, escalating the uncertainties surrounding future development. This study builds upon a deepened geological and gas reservoir engineering comprehension acquired during earlier phases of gas field development. It methodically identifies the factors influencing the advantageous development of the gas field and formulates technical countermeasures to ensure its sustainable development. Key findings from the research include: ① An empirical analysis, centered on economic production, evaluates the economic benefits of each block within the gas field. This model assesses the current benefit status and directs future overall development strategies. ② To foster the continued advancement of the tight gas industry within the field, the study evaluates the benefits of individual blocks and explores supportive measures for effective development. These measures include classified management and specific technical strategies, derived from geological and gas reservoir engineering perspectives. This approach culminates in the formulation of technical countermeasures aimed at enhancing the effective development of Sulige Gas Field, thereby ensuring its continued economic viability.

Key words: Sulige Gas Field, tight gas, open flow, internal rate of return, beneficial development

中图分类号:

TE37

程敏华,雷丹凤,张连群等. 苏里格致密砂岩气田效益开发技术对策研究[J]. 油气藏评价与开发, 2024, 14(3): 475-483.

Minhua CHENG,Danfeng LEI,Lianqun ZHANG, et al. Technical strategy for beneficial development of tight sand gas in Sulige Gas Field[J]. Petroleum Reservoir Evaluation and Development, 2024, 14(3): 475-483.

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区块名称	前3年平均日产气量	平均单井累计产气量
中区	1.10	1 813.29
东区	0.96	1 151.22
西区	0.80	1 022.70

区块	内部收益率/%						区块内部收益率/%
	<0		0~6		>6
	井数/口	百分比/ %	井数/口	百分比/ %	井数/口	百分比/ %
中区	1 002	23.33	557	12.98	2 735	63.69	15.87
东区	498	46.37	177	16.48	399	37.15	5.40
西区	1 448	57.10	271	32.21	817	32.21	-1.04
合计	2 948		1 005		3 951		20.32
加权平均		42.27		20.56		44.35	6.74

井类型	井数/ 口	有效厚度/ m	储量丰度/ （10⁸m³/km²）	初始套压/ MPa	目前套压/MPa	目前日均产气量 /10⁴ m³	累计产气量 / 10⁴ m³	EUR / 10⁴ m³	泄气范围/ km²
骨架井	34	12.54	1.44	20.2	8.2	0.27	1 988	2 483	0.188
加密井	86	9.60	1.17	20.1	13.5	0.52	230	1 156	0.136

无阻流量/10⁴ m³	产水井类型	合理配产比例
>10	低产水型	1/10~1/8
	中高产水型	1/15~1/10
	大气大水型	1/25~1/20
4~10	低产水型	1/8~1/6
	中高产水型	1/12~1/8
	大气大水型	1/16~1/12
<4	低产水型	1/4~1/3
	中高产水型	1/6~1/4
	大气大水型	间歇生产