渤海蓬莱91中生代花岗岩储层特征及有利区带分析.pdfVIP

Open Journal of Nature Science 自然科学, 2015, 3(4), 191-202 Published Online November 2015 in Hans. /journal/ojns /10.12677/ojns.2015.34024 Reservior Characteristics of Mesozoic Granite in Penglai 9-1 and Prediction of Potential Development Area Fengrong Wang CNOOC Tianjin Branch, Tianj in th th th Received: Nov. 11 , 2015; accepted: Nov. 25 , 2015; published: Nov. 30 , 2015 Copyright © 2015 by author and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract We made major breakthroughs in exploration in buried hills of Penglai 9-1 oilfield in Bohai basin. There is good oil-gas show in granite, which already forms oil-gas pools. However, there are some uncertainties in this set of granites, such as forming time, attitude, distributing scope, lithology characteristic, reservoir space types, major controlling factor of reservoir and so on. Systematic observation, description of drilling cores, sidewall cores and cuttings, zircon U-Pb dating, petro- graphy and geochemistry studies show that the granite is a Mesozoic acid intrusion in Proterozoic strata. The analyses such as casting thinsection observation and physical property analysis show that the reservoir space types in the granite are broken intergranular pores, dissolution pores, weathering fractures, structural fractures, etc. and it is mainly a pool of weathering crust which is strongly transverse homogeneous lithologic petroleum reservoir whose lower cores and fractures develop badly. Combined with logging and seismic method, we also studied the intrusive direction and s