Sequence division and controlling factors of reservoir development of the 4th Member of Leikoupo Formation in foreland of Longmen Mountains in the Western Sichuan Depression, Sichuan Basin

被引：0

作者：

Li H. ^{[1
,2
,3
]}

Hu X. ^{[1
,2
,3
]}

Shi Y. ^{[1
,2
,3
]}

Xiao K. ^{[1
,2
,3
]}

Jia Y. ^{[1
,2
,3
]}

Wei X. ^{[1
,2
,3
]}

Feng Q. ^{[1
,2
,3
]}

机构：

[1] State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing

[2] Key Laboratory for Marine Oil and Gas Exploitation, SINOPEC, Beijing

[3] Petroleum Exploration and Production Research Institute, SINOPEC, Beijing

来源：

Oil and Gas Geology | 2017年 / 38卷 / 04期

关键词：

Gas pool; Leikoupo Formation; Reservoir distribution; Sedimentary facies; Sequence stratigraphy; Sichuan Basin; Western Sichuan Depression;

D O I：

10.11743/ogg20170412

中图分类号：

学科分类号：

摘要：

Based on detailed observation of cores, thin section, well logging and seismic data analysis, high frequency sequence and sedimentary microfacies of the Upper T2l4 were studied in the Shiyangchang-Jinma-Yazihe area of foreland of Longmen Mountains in western Sichuan Depression. Combined with logging interpretation results, the reservoir distribution and controlling factors of reservoir development are analyzed. The results indicate that the Upper T2l4 can be divided into one fourth-order sequence, and may be further divided into multiple fifth-order and sixth-order high frequency sequences. The high frequency sequence has the characteristics of sedimentary assemblages obviously shallowing upward and their horizontal correlation is good. Sedimentary environments mainly are tidal flat in the research area, and the tidal flat depo-sits mainly develop intertidal zone and subtidal zone sub-facies. Lithology of flat deposits is varied in the vertical direction and is more stable in horizontal orientation. Intertidal zone is a favorite sub-facies for reservoir development, and can be divided into dolomite flat, algae dolomite flat, dolomite-lime flat micro-facies. Subtidal zone can be divided into lime flat, algae lime flat, dolomite lime flat micro-facies. Silty-fine dolomite flat, algal (laminated) dolomite flat in the intertidal zone is favorable micro-facies for reservoir development. They were usually distributed in middle-upper part of upper and lower reservoir with clear reservoir cycles. The favorable intertidal micro-facies distribution reservoir for development is controlled by (high frequency) sequence, which also has a certain impact to later diagenesis. The high frequency sequence is the key factor to affect reservoir formation and distribution. © 2017, Editorial Office of Oil and Gas Geology. All right reserved.

引用

页码：753 / 763

页数：10

共 31 条

[1]

Meng Y., Xu G., Liu Y., Et al., Hydrocarbon accumulation conditions of the weathering crust paleokarst gas reservoir of Leikoupo Formation, West Sichuan, China, Journal of Chengdu University of Technology (Science& Technology Edition), 42, 1, pp. 70-79, (2015)

[2]

Xu G., Song X., Feng X., Et al., Gas potential of the middle Triassic Leikoupo Fm in the western Sichuan basin, Natural Gas Industry, 33, 8, pp. 8-14, (2013)

[3]

Tang Y., Characterization of the sedimentation of the Leikoupo Formation and the weathering crust reservoirs at the top of the Formation in the western Sichuan Basin, Oil & Gas Geology, 34, 1, pp. 42-47, (2013)

[4]

Li S., Lu Q., Xu G., Et al., Reservoir prediction in the top Leikoupo unconformity surface in the area XC, Sichuan, Oil Geophysical Prospecting, 48, 5, pp. 793-798, (2013)

[5]

Xin Y., Gu M., Zhou J., Et al., Characteristics and affection of Middle Triassic karstification on Leikoupo 43 reservoir in Longgang area, Sichuan Basin, Marine Origin Petroleum Geology, 17, 1, pp. 73-78, (2012)

[6]

Zhong Y., Chen H., Lin L., Et al., Paleokarstification and reservoir distribution in the Middle Triassic carbonates of the 4th member of the LeikoupoFormation, northeastern Sichuan basin, ActaPetrologicaSinica, 27, 8, pp. 2272-2280, (2011)

[7]

Zhou J., Xin Y., Gu M., Et al., Direction of gas exploration in the Middle Triassic Leikoupo Formation of the Sichuan Basin, Natural Gas Industry, 30, 12, pp. 16-21, (2010)

[8]

Li Y., Fan Z., Developmental pattern and distribution rule of the fracture-cavity system of Ordovician carbonate reservoirs in the Tahe Oilfield, Acta Petrolei Sinica, 32, 1, pp. 101-106, (2011)

[9]

He J., Fang S., Hou F., Et al., Vertical zonation of weathered crust ancient karst and the reservoir evaluation and prediction-A case study of M<sub>55</sub>-M<sub>51</sub>sub-members of Majiagou Formation in gas fields, central Ordos Basin, NW China, Petroleum Exploration and Development, 40, 5, pp. 534-542, (2013)

[10]

Gu J., Characteristics and evolutional model of karst reservoirs of Lower Ordovician carbonate rocks in Lunnan area of Tarim Basin, Journal of Palaeogeography, 1, 1, pp. 54-60, (1999)

← 1 2 3 4 →