顺北超深层断控缝洞型气藏气井合理产能确定方法

doi:10.7657/XJPG20250415

摘要/Abstract

摘要：

塔里木盆地顺北超深层断控缝洞型气藏是天然气增储上产的重要阵地，确定气井合理产能对气藏的高效开发至关重要。顺北超深层断控缝洞型气藏储集层非均质性及应力敏感性强，物性差异大，需优化常规合理产能方法。结合地质与动态资料，顺北超深层断控缝洞型气藏F1条带可分为断裂+洞穴型储集体、断裂+孔洞型储集体和断裂/裂缝型储集体3类。高压气藏气井二项式产能方程表明断裂+洞穴型储集体无阻流量最大，断裂+孔洞型储集体次之，断裂/裂缝型储集体最小。产能试井法试井曲线表现为直线形、上翘形和下凸形，直线形和上翘形曲线合理油嘴均为测试范围内最大油嘴，下凸形曲线合理油嘴为拐点对应油嘴。压降法显示在测试范围内，断裂+洞穴型储集体合理油嘴越大越好，断裂+孔洞型储集体和断裂/裂缝型储集体合理油嘴越小越好。

关键词: 塔里木盆地, 超深层, 断控缝洞型气藏, 合理产能, 产能试井法, 压降法

Abstract:

The ultra-deep fault-controlled fractured-vuggy gas reservoirs in the Tarim Basin represent a principal option for increasing gas reserves and production. It is crucial to determine the reasonable productivity of gas wells for the efficient development of gas reservoirs. Shunbei ultra-deep fault-controlled fractured-vuggy gas reservoir is characterized by strong heterogeneity, high stress sensitivity, and varying physical properties, therefore, conventional methods for determining reasonable productivity of the reservoir need to be improved. Based on geological and production data, the reservoirs in the F1 zone of the Shunbei gas reservoir can be divided into three types: fault + cavity, fault + pore, and fault/fracture. According to the calculation by the binomial productivity equation for wells in high-pressure gas reservoirs, the fault + cavity reservoir show the highest absolute open flow potential (AOFP), followed by the fault + pore reservoir, and then the fault/fracture reservoir. The productivity test curves show 3 shapes such as linear, upward curved, and downward convex, with the reasonable choke as the largest choke within the testing range for the former two shapes, and as the choke at the inflection for the downward convex shape. The pressure drop method shows that, within the testing range, a larger reasonable choke is preferred for the fault + cavity reservoir, and a smaller reasonable choke for the fault + pore and fault/fracture reservoirs.

Key words: Tarim Basin, ultra-deep stratum, fault-controlled fractured-vuggy gas reservoir, reasonable productivity, productivity test method, pressure drop method

中图分类号:

TE34

于腾飞, 皇甫静静, 陈志辉, 王虹. 顺北超深层断控缝洞型气藏气井合理产能确定方法[J]. 新疆石油地质, 2025, 46(4): 505-511.

YU Tengfei, HUANGFU Jingjing, CHEN Zhihui, WANG Hong. Methods of Reasonable Productivity Determination for Ultra-Deep Fault-Controlled Fractured-Vuggy Gas Reservoirs in Shunbei Area[J]. Xinjiang Petroleum Geology, 2025, 46(4): 505-511.

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储集体类型	井名	二项式绝对无阻流量/（10⁴ m³·d^-1）	弹性产率/ （10⁴ m³·MPa^-1）	产能试井法合理产能/ （10⁴ m³·d^-1）	压降法合理产能/ （10⁴ m³·d^-1）	最终合理产能/ （10⁴ m³·d^-1）	配产系数	平均配产系数
断裂+洞穴型	S4-5井	459	4 825	30.8		30.8	1/14.9	1/12.7
	S44井	396	3 770	30.8	30.8	30.8	1/12.9
	S4-6井	203	2 009	14.0	14.0	14.0	1/14.5
	S43井	250	1 420	22.1		22.1	1/11.3
	S45井	336	1 318	34.5	34.5	34.5	1/9.7
断裂+孔洞型	S4-7井	242	1 757		17.5	17.5	1/13.8	1/8.5
	S4-2井	105	1 020	23.0		23.0	1/4.6
	S4-3井	160	873	19.6	15.0	19.6	1/8.2
	S47井	162	673	18.2		18.2	1/8.9
	S4-4井	107	477	20.0	11.8	20.0	1/5.4
	S4-12井	225	359	22.5	11.5	22.5	1/10.0
断裂/裂缝型	S4-1井	84	610	12.2	12.2	12.2	1/6.9	1/6.9