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针对博兴洼陷古近系沙三段浊积砂体的空间分布和油气成藏特点,提出了一套浊积型岩性油藏精细勘探的新模式:在高分辨率层序地层学和沉积体系分析、古地貌分析的基础上,划分精细勘探的基本层序单元——中期旋回(四级层序),确定砂体发育的有利层序层位和部位;以中期旋回为基本单元,进行成藏期古异常地层压力的分布研究,寻找烃源岩排烃、油气成藏的有利层位和部位;三者耦合,确定优选勘探目标,进行储层测井约束反演和属性分析,确定有利砂体的分布范围,并提供钻探目标。应用该工作方法,在博兴洼陷地区实施精细勘探,得到了较好的应用效果。
Aiming at the spatial distribution and reservoir forming characteristics of turbidite sand bodies in the third member of Paleogene in Boxing Sag, a new model for fine exploration of turbidite reservoir is put forward. In high resolution sequence stratigraphy and Based on the analysis of sedimentary system and palaeogeomorphology, we divide the basic sequence unit (Mesozoic sequence) of fine exploration into the favorable sequence stratigraphy and site of sand body development. Taking the middle cycle as the basic unit, To study the distribution of the anomalous formation pressure in the reservoir-forming period, and to search for the favorable layers and positions of hydrocarbon expulsion and hydrocarbon accumulation in the source rocks. The three are coupled to determine the preferred exploration targets and perform logging inversion and attribute analysis. Determine the distribution of favorable sand bodies and provide drilling targets. Applying this working method, the fine exploration is carried out in the Boxing depression, and a good application result has been obtained.