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含油气盆地致密砂岩类油气藏成因机制与资源潜力
庞雄奇,周新源,董月霞,姜振学,姜福杰,范柏江,邢恩袁,庞宏
0
(中国石油大学油气资源与探测国家重点实验室,北京 102249;中国石油大学盆地与油藏研究中心,北京 102249;中国石油塔里木油田公司, 新疆库尔勒 841000;中国石油冀东油田公司,河北唐山 063004)
摘要:
通过对典型致密砂岩油气藏的解剖,并结合成藏过程中油气排运时期和储层致密演化时期匹配关系分析,确定含油气盆地深部发育致密常规油气藏、致密深盆油气藏、致密复合油气藏3种不同类型的致密砂岩类油气藏;在此基础上采用理论计算对中国致密砂岩油气资源进行评价。结果表明:沉积盆地内部实际存在的油气资源量比以往认识和评价的结果大很多,目前中浅部见到的和已发现的常规油气资源不到盆地内富集资源总量的25%,大于75%的油气资源富集在孔隙度小于12%、渗透率小于1×10-3 μm2的致密砂岩储层内;在致密油气资源中,致密常规油气资源大致超过油气总资源的25%,致密深盆油气资源超过50%;致密油气资源是含油气盆地挖潜勘探和可持续发展的最主要方向。
关键词:  致密砂岩油气藏  含油气盆地  成因机制  资源评价
DOI:10.3969/j.issn.1673-5005.2013.05.005
投稿时间:2013-05-22
基金项目:国家重点基础研究发展规划“973”项目(2011CB201100);国家科技重大专项(2011ZX05006-006);国家自然科学基金项目(41102085)
Formation mechanism classification of tight sandstone hydrocarbon reservoirs in petroliferous basin and resources appraisal
PANG Xiong-qi,ZHOU Xin-yuan,DONG Yue-xia,JIANG Zhen-xue,JIANG Fu-jie,FAN Bo-jiang,XING En-yuan,PANG Hong
(State Key Laboratory of Petroleum Resources and Prospecting in China University of Petroleum, Beijing 102249, China;Basin and Reservoir Research Center in China University of Petroleum, Beijing 102249, China;Tarim Oilfield Company, PetroChina, Korla 841000, China;Jidong Oilfield Company, PetroChina, Tangshan 063004, China)
Abstract:
A comprehensive review on the forming mechanisms of typical tight-sandstone hydrocarbon reservoirs was presented. Based on pattern matching between oil migration period and tight reservoir evolution, typical tight sandstone reservoirs were summarized into three catgories: conventional tight sandstone reservoir, deep basin tight sandstone reservoir and composite tight sandstone reservoir. Through theoretical calculation, tight-sandstone hydrocarbon resources in China were reappraised. The results reveal far more potential hydrocarbon resources than estimated before. The conventional hydrocarbon resources discovered so far account for less than 25% of the total basin hydrocarbon resources, while more than 75% of hydrocarbon resources concentrate in tight sandstone reservoirs with low porosity (<12%) and low permeability (<10-3 μm2). In the latter, over 25% of hydrocarbon concentrates in the tight conventional reservoirs, and over 50% in the tight deep-basin reservoirs. It is therefore suggested that tight hydrocarbon reservoirs remain the main focus in the future hydrocarbon explorations and sustainable developments.
Key words:  tight sandstone hydrocarbon reservoir  petroliferous basin  formation mechanism  resource evaluation
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