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ANALYSIS ON DEPOSITIONAL FACIES AND RESERVOIR OF THE GANCHAIGOU FORMATION,WESTERN QAIDAM BASIN

Wang De-hai

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Abstract

Based on the observation of the outcrops,we studied the details of the sedimental facies in Ganchaigou Formation,and analysed the variety of sedimental facies,including alluvial-fan facies,braided stream facies,fan-delta facies,lacustrine facies,lacustrine floor fan facies and storm deposit facies.We then studied the details of the characteristics of the lateral distribution of the sedimental facies.We suggest that the favorable reservoir facies within Ganchaigou Formation in West Qaidam Basin are delta front facies,fan-delta front facies,dam-and-beach facies of the littoral and shallow lake,lacustrine floor fan facies and carbonates facies.Studies on the combination of source rocks and reservoirs show that Yuejin-Dongchaishan,Dafengshan and the front part of Arjinshan area are the most favourable areas for oil and gas accumulation.

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What this paper is about

Based on the observation of the outcrops,we studied the details of the sedimental facies in Ganchaigou Formation,and analysed the variety of sedimental facies,including alluvial-fan facies,braided stream facies,fan-delta facies,lacustrine facies,lacustrine floor fan facies and storm deposit facies.We then studied the details of the characteristics of the lateral distribution of the sedimental facies.We suggest that the favorable reservoir facies within Ganchaigou Formation in West Qaidam Basin are delta front facies,fan-delta front facies,dam-and-beach facies of the littoral and shallow lake,lacustrine floor fan facies and carbonates facies.Studies on the combination of source rocks and reservoirs show that Yuejin-Dongchaishan,Dafengshan and the front part of Arjinshan area are the most favourable areas for oil and gas accumulation.

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Available abstract

Based on the observation of the outcrops,we studied the details of the sedimental facies in Ganchaigou Formation,and analysed the variety of sedimental facies,including alluvial-fan facies,braided stream facies,fan-delta facies,lacustrine facies,lacustrine floor fan facies and storm deposit facies.We then studied the details of the characteristics of the lateral distribution of the sedimental facies.We suggest that the favorable reservoir facies within Ganchaigou Formation in West Qaidam Basin are delta front facies,fan-delta front facies,dam-and-beach facies of the littoral and shallow lake,lacustrine floor fan facies and carbonates facies.Studies on the combination of source rocks and reservoirs show that Yuejin-Dongchaishan,Dafengshan and the front part of Arjinshan area are the most favourable areas for oil and gas accumulation.

Key concepts: Facies, Geology, Outcrop, Alluvial fan, Structural basin, Geochemistry, Sedimentary depositional environment, Petrology

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ANALYSIS ON DEPOSITIONAL FACIES AND RESERVOIR OF THE GANCHAIGOU FORMATION,WESTERN QAIDAM BASIN — Research Paper | ScholarLens