开发老区寻找“水区”油气地质储量的途径与方法

Pathway and method in searching for"water area"oil and gas geologic reserves in developed old blocks

相对于“干带”,开发老区中的“水区”储层物性较好,产液量较高,发现油层投产能够收到较好效益。为了在“水区”中发现油层,在介绍采油区内部查漏补缺、采油区周缘水区扩边、“空白层段”“空白带”“空白圈闭”寻找油层以发现“水区”油气地质储量的基础上,探讨了在采油区内部通过平面分析、纵向对比、完善解释图板、校正构造、细分小层等途径寻找“水区”油层,在采油区周缘“水区”通过分析成藏主控因素、油水界面实现油层扩边,在“空白层段”“空白带”“空白圈闭”通过运用成藏规律分析、微构造分析、圈闭类比分析、加深钻进等发现油层的开发老区“水区”找油的可行技术方法。经试油验证,以上一些解释评价方法应用效果较好,可为在开发老区的“水区”寻找油气地质储量提供线索。

Compared with the"dry belts",the reservoirs of the"water areas"in developed old blocks have good physical properties and high liquid⁃producing capacity and discovering oil layers for production can receive good benefits.In order to find the oil layers in the"water areas",based on the introduction of searching for the lost hydrocarbon reservoirs within the oil producing regions,the"water area"expanding edges around the oil producing regions,and the"blank interval""black zone""blank trap"looking for the oil layers to find oil and gas geologic reserves in the"water areas",this paper explored the search for"water area"oil layers within the oil producing regions through pathways such as plane analysis,longitudinal contrast,improving the interpretation charts,correcting the structure and subdividing the subzones.By analyzing the main control factors of forming reservoirs and the oil⁃water interface in the peripheral"water areas"of the oil producing regions,the edge expansion of oil layers can be achieved.In blank intervals,blank zones and blank traps,the feasible technical methods for exploring oil in the"water areas"of developed old blocks include the analysis of hydrocarbon accumulation rule,microstructure analysis,analogous analysis of traps and prolonged drilling.It is proved by oil testing that the above interpretation and evaluation methods have good application effects,and can provide clues for searching for oil and gas geologic reserves in the"water areas"of developed old blocks.