张强凹陷长北地区石油地质与油气成藏规律

张强凹陷前辛断裂背斜构造带为凹陷的油气富集构造带，长北地区位于该带的北端，是一个地质条件复杂的复式油气聚集区。该区具有两套烃 源岩系、多个储集体和多种构造类型；生储盖组合以“自生自储式”为主。区内断层十分发育，油气运移条件好；油藏类型可分断裂背斜油藏、岩性－构造油藏、构造-岩性油藏、喷发岩潜山裂缝油藏等四类。文章从构造特征、沉积相类型、储集层条件、油藏类型等方面分析研究了长北地区油气聚集带的主要含油气特点及油气聚集规律，旨在对其他凹陷及类似该构造带的油气勘探与开发有所借鉴。

Oil geology and oil-gas reservoir forming rules in Changbei area of Zhangqiang sag

Qianxin faulted anticlinal structural belt is the belt with abundant hydrocarbon in Zhangqiang sag. Changbei area locates at the north end and it is a multiple oil?gas accumulation zone with complex geological conditions. There are two sets of source rock series, many reservoirs and structural types in this area. The autogeneous and self?accumulation is the main type of source?reservoir?seal combination. The faults are very developed, and it is favorable to migration of oil and gas. There are four types of reservoirs: faulted anticlinal, lithologic?structural, structural?lithologic and effusive rock buried hill fractured reservoirs. Main oil?gas features and oil?gas accumulation rules of accumulation zone in Changbei area are analyzed and studied from the aspects of structural attitude, type of sedimentary facies, reservoir conditions and reservoir type with the aim of guiding exploration and development of other sags and similar structural belts.