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Organic Matter Enrichment and Hydrocarbon Source Rock FormingMechanism in Small-Scale Faulted Lacustrine Basins:A Case from the Frist Member of Lower Cretaceous Tenger Formation in Erlian Basin(PDF)

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

Issue:
2017年06期
Page:
650-
Research Field:
Publishing date:

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Title:
Organic Matter Enrichment and Hydrocarbon Source Rock FormingMechanism in Small-Scale Faulted Lacustrine Basins:A Case from the Frist Member of Lower Cretaceous Tenger Formation in Erlian Basin
Author(s):
DING Xiujian1 LIU Guangdi2 ZHAO Longmei3 GAO Dengkuan4 ZHANG Kai5 KUANG Daqing6

(1.School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China; 2.College of Geosciences, China University of Petroleum, Beijing 102249, China; 3.National Engineering Research Center, China United Coalbed Methane Corporation Ltd., Beijing 100095, China; 4.Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China; 5.Production Engineering Research Institute, Daqing Oilfield Company Limited, PetroChina, Daqing, Heilongjiang 163000, China; 6.China Petroleum Technology and Development Corporation, Beijing 100028, China)

Keywords:
Erlian basin small-scale faulted basin source rock diagenesis pattern sedimentary environment depositional rate terrigenous organic matter paleo-productivity
PACS:
TE112.1;TE122.1
DOI:
10.7657/XJPG20170604
Abstract:
To recognize forming mechanism of source rocks in small-scale faulted lacustrine basins, the paper studies formation, distribution and geochemical characteristics of source rocks, and establishes 3 source rock formation patterns in small-scale faulted lacustrine basins by integrating the influences of organic matter supply, preservation and dilution on source rock forming. In a lacustrine basin with active boundary fault and high depositional rate, organic matter supply is sufficient but its preservation condition is poor, the source rock is mainly constrained by the organic matter supply and is mainly developed in deep depressions with abundant organic matter supply; in a lacustrine basin with inactive boundary fault and low depositional rate, the organic matter supply is of small quantity and its preservation condition is good, the source rock is mainly controlled by organic matter preservation conditions and is mostly distributed in gentle slopes with high reduction degree; in a lacustrine basin with moderate-active boundary fault and moderate depositional rate, the organic matter supply is of large quantity and its preservation condition is relatively good, the source rock is controlled by depositional rate, organic matter supply and preservation, and is developed in both deep depressions and near-depression gentle slopes.

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Last Update: 2017-12-08