地质通报2012，Vol.31Issue(11)：1894-1901,8.
贵州仁怀县震旦系灯影组古油藏成藏条件及油气地质意义
The discovery and petroleum geological significance of Dengying Formation paleo-reservoirs in Renhuai, Guizhou
摘要
Abstract
Field observation and investigation shows that the paleo-reservoir in Sinian Dengying Formation in Renhuai of Guizhou Province has the depositional environment of bank facies with doloarenite, oolitic dolomite, algal dolomite and fine -crystalline dolomite. The black solid bitumen is massive, hard, staining hands, and filled in the intercrystal pores, interparticle dissolution pores and dissolution caves of the rocks. Microscopic observation of asphalt shows the intermediate phase structure and the mosaic-like structural features, bitumen reflectance is 2.95％~3.86％, there exists double reflection and a high degree of thermal evolution, and the reservoir once experienced exposure to high temperature thermal evolution. The investigation and research on regional geology and sedimentary facies show that there probably existed platform-marginal shoal facies and shoal facies of open platform facies in Late Dengying period. The deposition pattern controlled shoal reservoir development and distribution. The formation of ancient exposures controlled the reformation of shoal dolomite in late Sinian period and Tongwan tectonic movement. Sinian Doushantuo Formation and Lower Cambrian Niutitang Formation black shales had a high organic matter abundance and good organic matter type, thus providing the ancient oil reservoir with a wealth of materials, and Lower Cambrian shale provided oil and gas with a favorable cover conditions, thus forming a good combination of reservoirs. The unconformity between Dengying Formation and Niutitang Formation controlled the channel for hydrocarbon migration, whereas the Early Caledonian movement in central Gui2hou uplift created a structural and litho-logic traps for oil and gas accumulation.关键词
灯影组/古油藏/成藏条件/C、O同位素/仁怀Key words
Dengying Formation/ paleo-reservoir/ hydrocarbon pooling conditions/ carbon and oxygen isotope/ Renhuai分类
天文与地球科学引用本文复制引用
杨平,汪正江,贺永忠,杜秋定,刘家洪,张娣..贵州仁怀县震旦系灯影组古油藏成藏条件及油气地质意义[J].地质通报,2012,31(11):1894-1901,8.基金项目
中国地质调查局地质调查项目《雪峰山西侧地区海相油气地质调查》(编号:1212010782003)和国家自然科学基金项目《黔东新元古代中期沉积盆地演化与地层划分对比研究》(批准号:41072088) （编号:1212010782003）
