|Table of Contents|

Genesis and Sweet Spot Prediction of Jurassic Tight Sandstone Reservoir in Central Sichuan Basin(PDF)

《新疆石油地质》[ISSN:1001-3873/CN:65-1107/TE]

Issue:
2018年05期
Page:
555-
Research Field:
Publishing date:

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Title:
Genesis and Sweet Spot Prediction of Jurassic Tight Sandstone Reservoir in Central Sichuan Basin
Author(s):
ZOU Juan1 LE Yuan1 JIN Tao1 LI Xiuqing1 LI Xuesong2 WEI Tengqiang1
(1.Research Institute of Exploration and Development, Southwest Oil & Gas Field Company, PetroChina, Chendu, Sichuan 610041, China; 2. Research Institute of Exploration and Development, Xinjiang Oilfield Company, Petrochina, Karamay, Xinjiang 834000, China)
Keywords:
Sichuan basin central Sichuan basin Jurassic tight sandstone reservoir sweet spot prediction
PACS:
TE122.23
DOI:
10.7657/XJPG20180509
Abstract:
The reservoirs of Jurassic Lianggaoshan formation and Sha-1 member of Shaximiao formation in Sichuan basin are typical extra-low porosity and extra-low permeability reservoirs with strong heterogeneity and great difficulties to predict sweet spots. To predict the favorable areas of sweet spot, the paper studies the reservoir characteristics and its forming mechanism based on the analysis of core, thin section, SEM, X-ray diffraction and inclusion. The study results show that the Jurassic tight sandstone reservoirs are the products of the dissolution of facies-controlled sandbodies during the middle diagenetic period in the Sichuan basin and the structural fractures formed in the middle and late periods can improve the reservoir capability. The sweet spots in the reservoirs are controlled by sedimentary sandbody, diagenetic dissolution and structural fractures, and mainly distributed in the areas where microfacies such as beach bar, distributary channel and river mouth bar, hydrocarbon charging phases and fractures superimpose with each other. The sweet spots of Lianggaoshan formation are mainly found in the areas of Gongshanmiao, Longgang-Yingshan, Lianchi-Chongxi etc.; and the sweet spots of Sha-1 member are mainly distributed in the areas of Gongshanmiao, Wellblock Longgang-9, Shuijiacao and Dacheng-Guang’an etc

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Last Update: 2018-10-09