Suggestion of Exploration Prospect in Raoyang Sag of Jizhong Depression from the Logging Evaluation Results of Source Rock

JIN Tao, GAO  Ri-sheng, GAO  Cai-Xia, LUO  Qiang, WANG  Jian

doi:10.11764/j.issn.1672-1926.2010.03.406

2010 , Vol. 21 >Issue 3: 406 - 412

DOI: https://doi.org/10.11764/j.issn.1672-1926.2010.03.406

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Suggestion of Exploration Prospect in Raoyang Sag of Jizhong Depression from the Logging Evaluation Results of Source Rock

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1.Exploration and Development Research Institute, PetroChina Huabei Oilfield Company,
Renqiu 062552,China;2.Africa Department of Petroleum Exploration and Development
Research Institute, PetroChina, Beijing 100083,China

Received date: 2010-01-28

Revised date: 2010-04-25

Online published: 2010-06-10

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Abstract

Since the number of rock samples and quality of core constrain the conventional geochemical measurement and hydrocarbon-generated evaluation for source rock, it is difficult to reveal the real spatial distribution of source rock. The logging method associated with the geochemical analysis can carry out the prediction of total organic carbon TOCof source rock and spatial distribution by mean of the high vertical resolution log data. Based on relationship between TOCand hydrogen index I_H, the lacustrine source rock in the Jizhong depression can be divided into three class as follows: High quality source rock with TOC>2%, good source rock with TOC=1%-2%, and poor source rock with TOC=0.5%-1%, respectively. The lateral and vertical distribution of paelocene lacustrine source rock was controlled by depositional facies, and the high quality source rock mainly was developed in the depositional center. From the margin to the basinal center, the thickness of the high quality source rock is various from thin to thick. According to evaluation of logging data, distribution and prospect of potential resource, the future favorable exploration area should focus on the buried hill, Paleocene deep lithological layer, shallow and middle complex fault-block structure in the Raoyang sag.

Key words： Raoyang sag; Source rock logging evaluation; High quality source rocks; Exploration prospect.

Cite this article

JIN Tao, GAO Ri-sheng, GAO Cai-Xia, LUO Qiang, WANG Jian . Suggestion of Exploration Prospect in Raoyang Sag of Jizhong Depression from the Logging Evaluation Results of Source Rock[J]. Natural Gas Geoscience, 2010 , 21(3) : 406 -412 . DOI: 10.11764/j.issn.1672-1926.2010.03.406

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