优质页岩气储层测井特征分析

doi:10.13809/j.cnki.cn32-1825/te.2022.03.006

Abstract

Abstract:

The logging response characteristics of different productivity shale gas wells are obviously different. By comparing and analyzing the logging response characteristics of shale gas well with different productivity, the logging response characteristics of high production shale gas reservoir are summarized. Then, by the analyses of the differences of lithology, electrical properties, physical properties, in-situ stress and pore pressure in shale gas wells with different productivity, and the geophysics logging information such as resistivity logging, radioactive logging and acoustic scanning, etc., a set of high-quality and high-yield shale reservoir identification methods based on integrated logging response characteristics is developed by considering the key parameters of organic quality and formation pressure to reflect shale gas productivity. The results show that the electrical characteristics of high-quality and high-yield shale reservoirs are high gamma-ray, low density, low neutron, high acoustic time difference and medium-high resistivity. This set of analysis method can accurately identify the exploration and development potential of shale reservoirs. The comparison between the field gas test results of different types of shale gas reservoirs in different shale gas blocks in southeastern Sichuan and the results of comprehensive well logging analysis shows that the method has a high coincidence rate. It can provide scientific basis for later completion plan decision of shale gas well.

Key words: shale gas, organic carbon, gas content, rock mechanics, formation pressure, resistivity

CLC Number:

TE132

Lin MA,Xiani JIANG,Jinsong GONG. Analysis of logging characteristics of high quality shale gas reservoirs[J]. Petroleum Reservoir Evaluation and Development, 2022, 12(3): 445-454.

Figures/Tables 13

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References 23

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井名	普通页岩纵横波时差交会斜率	含气页岩纵横波时差交会斜率	计算地层压力系数	实测地层压力系数	相对误差（%）
S1	0.036 97	0.027 64	1.34	1.66	19.2
J3	0.036 52	0.025 90	1.41	1.35	4.5
J4	0.037 33	0.030 71	1.22	1.12	8.9
J5	0.034 64	0.028 86	1.20	1.15	4.3
L1	0.042 58	0.038 35	1.11	1.08	2.8
P1	0.037 81	0.036 45	1.04	0.98	6.1

井名	最大水平主应力（MPa）	最小水平主应力（MPa）	应力差异系数（%）	压力类型
P1	57	39	46.2	常压
L1	67	51	31.4	常压
L2	61	46	32.6	常压
L3	71	57	24.6	常压
J3	52	45	15.6	超压
J1	84	77	9.1	超压
J4	75	68	10.3	超压
J5	63	54	16.7	超压
S1	81	72	12.5	超压
S2	72	66	9.1	超压

Analysis of logging characteristics of high quality shale gas reservoirs

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