观音桥段地质特征及其对页岩气产量的影响——以南川地区为例

Abstract

Abstract:

The guanyinqiao member in Southeast of Chongqing is a suit of argillaceous limestone formation formed in the Nantes period. The sea level and the control of ancient landform are the main factors affecting the strata. The strata overlying and underlying layer are both black shale formed in deep-water sedimentary environment. On the plane, Guanyinqiao member is distributed uniformly and missing in some parts. By analyzing the characteristics of Guanyinqiao member in Nanchuan area, and combined with the static evaluation indexes and single well productivity of the shale gas wells in this area, we analyzed that whether there was the relationship between the productivity of shale gas well and the existence of the member, thus affecting the shale gas production. The conclusion has geological guidance to the selected areas of shale gas in the Southeast of Chongqing, and great guiding significance on exploration strategy of shale gas.

Key words: Nanchuan district, Guanyinqiao member, shale gas, selected area

CLC Number:

TE122

Li Jiaxin. Geological features of Guanyinqiao member and its influence on the shale gas production: A case study of Nanchuan district[J].Reservoir Evaluation and Development, 2018, 8(4): 68-72.

Figures/Tables 5

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Table 1

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References 20

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井号	①— ⑤ 厚度/m	平均TOC,%	平均孔隙度,%	含气性/（m³·t^-1）	脆性矿物含量,%
胜页1	30	3.1	2.2	3.2	44.7
焦页194-3	34.7	3.2	3.8	3.0	49.3
焦页195-2	33	3.2	3.7	3.1	48.6

井号	油嘴10 mm		油嘴12 mm
井号	井口压力/MPa	瞬时气量/（10⁴m³·d^-1）	井口压力/MPa	瞬时气量/（10⁴m³·d^-1）
胜页1HF	10.47 ~ 10.61	7.00 ~ 7.05	7.51 ~ 10.47	9.26 ~ 10.52
焦页194-3HF	22.0 ~ 22.1	22.9 ~ 23.7	20.5 ~ 20.8	30.7 ~ 34.2
焦页195-2HF	20.7 ~ 21.1	22.6 ~ 23.2	21.1 ~ 23.8	36.6 ~ 42.0
焦页195-5HF	13.8 ~ 14.2	11.9 ~ 12.1	14.3 ~ 14.8	21.7 ~ 30.6
焦页197-4HF	22.7 ~ 22.8	22.9 ~ 23.7	21.2 ~ 21.4	29.4 ~ 31.4

Geological features of Guanyinqiao member and its influence on the shale gas production: A case study of Nanchuan district

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