油气富集程度的定量评价方法及其应用Quantitative evaluation method of oil-gas enrichment degree and its application
高剑雄,范婕,张奎华,秦峰,郭瑞超
GAO Jianxiong,FAN Jie,ZHANG Kuihua,QIN Feng,GUO Ruichao
摘要(Abstract):
油气富集程度的评价及预测是油气成藏和勘探部署分析的重要内容,其结果对资源潜力评价和勘探部署具有重要指导意义。在总结前人方法优缺点的基础上,提出评价单井各层段油气富集程度的方法——根据已知储量井的录井、测井和试油资料,利用油气显示级别对单井3种资料进行赋值,结合各油气层段的砂岩厚度,计算3种资料的油气聚集有效值,并建立其与储量丰度的数学关系,进而预测未知储量井各层段的油气富集程度。以准噶尔盆地莫西庄—永进地区为例,利用该方法预测了各井不同层段的油气富集程度。通过对比勘探成果与该方法的计算结果,认为其平均相对误差一般在10%以内,因此该方法具有可行性和准确性。评价结果表明,该区在征沙村中部和永进东北部油气富集程度较高,是将来增储上产预备区;深层三叠系百口泉组油气富集程度较高,但探明程度较低,为下步勘探的重点方向;探区东部凸起与凹陷过渡区为下步选区有利区。
The evaluation and prediction of oil-gas enrichment degree is an important part of the analyses of oil-gas accumulation and exploration deployment, and the results have an important guiding significance for the resource potential evaluation and exploration deployment. On the basis of summing up the advantages and disadvantages of the previous methods, the method was put forward to evaluate the degree of the oil-gas enrichment in each layer of a single well.According to the mud logging, well logging and oil tested data of the well with known reserves, oil-gas display level was used to assign values to three kinds of the data in single well. Combining the sandstone thickness of each oil and gas interval, the effective values of oil and gas accumulation of three kinds of the data were calculated, and the mathematical relationship between them and reserves abundance was established, so as to predict the oil and gas enrichment degree of each interval of the well with unknown reserves. Taking Moxizhuang-Yongjin area in Junggar Basin as an example, the oil-gas enrichment degrees of different intervals of each well were predicted. By comparing the explored results with the calculated results of the method, it is considered that the average error is less than 10%, so the method is feasible and accurate. The evaluated results show that the area is rich in oil and gas in the middle of Zhengshacun and the northeast of Yongjin, which are the reserve areas for increasing reserves and production in the future; the oil-gas enrichment degree in the deep Triassic Baikouquan Formation is higher, but its exploration degree is rather low, which is the key direction of the next exploration; the transition area between the uplift and sag in the east of the exploration area is the favorable area and play for the next step.
关键词(KeyWords):
油气富集程度;油气聚集;储量丰度;准噶尔盆地;莫西庄-永进地区
oil-gas enrichment degree;oil-gas accumulation;reserves abundance;Junggar Basin;Moxizhuang-Yongjin area
基金项目(Foundation): 国家科技重大专项“准噶尔盆地碎屑岩层系油气富集规律与勘探评价”(2016ZX05002-002);; 中石化股份公司课题“准噶尔探区二、三叠系油气成藏条件及目标评价”(P19016-1);; 山东省博士后创新项目“凝析油气藏断-压-盖耦合控藏机理研究”(202003075);; 胜利油田分公司课题“准南类前陆背景古近系源岩成烃机制及模式”(YJQ2002);胜利油田管理局博士后科研课题“莫西庄—永进地区油气成藏主控因素及模式研究”(YKB1901)
作者(Author):
高剑雄,范婕,张奎华,秦峰,郭瑞超
GAO Jianxiong,FAN Jie,ZHANG Kuihua,QIN Feng,GUO Ruichao
DOI: 10.19597/j.issn.1000-3754.202005038
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- 油气富集程度
- 油气聚集
- 储量丰度
- 准噶尔盆地
- 莫西庄-永进地区
oil-gas enrichment degree - oil-gas accumulation
- reserves abundance
- Junggar Basin
- Moxizhuang-Yongjin area