石油勘探与开发2011，Vol.38Issue(3)：294-298,5.
鄂尔多斯麻黄山西区中生界过剩压力与油气关系
Relations of overpressure and hydrocarbons in the Mesozoic of western Mahuangshan, Ordos Basin
李兴文 1李仲东 2过敏 2惠宽洋 2丁小琪 3邓文龙2
作者信息
- 1. 中国石化西南油气分公司川西采气厂地质研究所
- 2. 成都理工大学油气藏地质及开发工程国家重点实验室
- 3. 中国石化华北分公司勘探开发研究院
- 折叠
摘要
Abstract
The mudstone compaction research, in combination with hydrocarbon distribution, reveals that the Mesozoic overpressure in western Mahuangshan is horizontally distributed in the eastern stable belt and the central depression belt, vertically mainly in the Chang 7 and Yan 7 members in western Mabuangshan. Oil source faults and deeply undercut river valleys act as migration pathways for the discharge and accumulation of oil and gas in the Yan'an Formation. The Yan'an Formation regional overpressure belt strengthens the sealing ability of the regional cap rock, preventing upward migration or dissipation of oil and gas, and oil and gas can only accumulate below the overpressure area. Minor faults and the crack system have a certain decompression function to the Yah'an Formation overpressure area, and this is the reason why some oil is currently discovered above the overpressure's region of the Yan'an Formation in the eastern stable belt. Three patterns of oil and gas distribution associated with overpressure are developed in the Mesozoic in the eastern stable belt; they are lower combination, middle combination and upper combination. The middle combination pattern is developed in the central depression belt and western fracture belt.关键词
过剩压力/运移通道/封盖能力/成藏/麻黄山西区/鄂尔多斯盆地Key words
overpressure/ migration pathway/ sealing ability/ hydrocarbon accumulation/ western Mahuangshan/ Ordos Basin分类
能源科技引用本文复制引用
李兴文,李仲东,过敏,惠宽洋,丁小琪,邓文龙..鄂尔多斯麻黄山西区中生界过剩压力与油气关系[J].石油勘探与开发,2011,38(3):294-298,5.
