柴达木盆地冷湖0-5号构造侏罗系成藏条件及勘探方向

摘要

No.0- 5 Lenghu Structure in Qaidam Basin is fol owing Jura for a petroleum hydrocarbon source rocks of tectonic belt, In addition to No.3 Lenghu oilfield are now a Jurassic outside the original oil, Other tertiary secondary hydrocarbon reservoirs in the oilfield are found. Based on 3d seismic fineinterpretationofthetectonicbeltanddril inganalysis,wethinkNo.0- 5LenghuStructurehavetheformationofpetroleumgeologicalconditionsof theJurassicoriginaloil,andaccordingtotheregionalgeologicalcharacteristicsandspecificaccumulationconditions,Weputforwardtheexplorationidea of“Thefaultterracelookingforoil”andthefavorableexplorationdirectioninNo.0- 5LenghuStructure.%冷湖0-5号构造是柴达木盆地以下侏罗统为烃源岩的一个含油气构造带，目前除冷湖3号油田为侏罗系原生油气藏外，其他所发现的油田均为第三系次生油气藏。通过对该构造带三维地震精细解释及钻井分析认为，冷湖0-5号具备形成侏罗系原生油气藏的石油地质条件，并根据区域地质特征及其具体成藏条件，提出了冷湖0-5号构造“下断阶找油”的勘探思路及有利勘探方向。