油源断裂输导油气时间有效性研究方法及其应用

发布时间：2018-05-09 05:16

本文选题：油源断裂 + 输导期　；参考：《岩性油气藏》2016年06期

【摘要】：为了研究油源断裂在油气成藏中的作用,在油源断裂厘定、输导期和源岩生排烃期研究的基础上,通过比较油源断裂输导油气期与源岩生排烃高峰期之差和源岩生排烃高峰期与其开始生排烃期或停止生排烃期之差比值的大小,建立了一套油源断裂输导油气时间有效性的研究方法,并将其应用于松辽盆地徐家围子断陷油源断裂输导天然气时间有效性的研究中。结果表明:徐家围子断陷营城组火山岩储层在青山口组—姚家组沉积时期,油源断裂输导天然气时间有效性评价等级为好,最有利于天然气运聚成藏;嫩江组沉积末期,油源断裂输导天然气时间有效性评价等级为较好,较有利于天然气运聚成藏;明水组沉积末期,油源断裂输导天然气时间有效性评价等级为中等,不利于天然气运聚成藏;火石岭组—营城组沉积时期和古近系沉积末期,油源断裂输导天然气时间有效性评价等级均为差,均无天然气运聚成藏。该结果与目前徐家围子断陷营城组火山岩储层中流体包裹体均一温度揭示的天然气成藏时期相吻合,表明该方法用于研究油源断裂输导油气时间有效性是可行的。
[Abstract]:In order to study the role of oil-source faults in oil and gas reservoir formation, based on the determination of oil-source faults, the period of transportation and hydrocarbon generation and expulsion of source rocks, By comparing the difference between oil source fault migration period and source rock hydrocarbon generation and expulsion peak and the ratio between source rock generation and expulsion peak and its starting hydrocarbon generation and expulsion stage or stopping hydrocarbon generation and expulsion stage, the difference between source rock generation and hydrocarbon expulsion peak and source rock hydrocarbon generation / expulsion period is compared. A set of methods for studying the time efficiency of oil and gas transportation from oil source faults are established and applied to the study of time efficiency of oil source faults in the Xujiaweizi fault depression of Songliao Basin. The results show that in the sedimentary period of Qingshankou-Yao formation in Yingcheng formation of Xujiaweizi fault depression, the evaluation grade of time effectiveness of oil source fault transporting natural gas is good, which is most favorable to the migration and accumulation of natural gas, and the late sedimentary stage of Nenjiang formation, The evaluation grade of time efficiency of transporting natural gas from oil-source faults is good, which is favorable to the migration and accumulation of natural gas reservoirs, and the evaluation grade of time efficiency of transporting natural gas from oil-source faults is medium, which is not conducive to the migration and accumulation of natural gas reservoirs in the late stage of deposit of Mingshui formation. In both the sedimentary period of Huosiling formation and Yingcheng formation and the late Paleogene period, the evaluation grade of time efficiency of transporting natural gas from oil source fault is poor, and there is no migration and accumulation of natural gas accumulation. The results are in agreement with the gas accumulation period revealed by the homogeneous temperature of fluid inclusions in the volcanic reservoir of Yingcheng formation in Xujiaweizi fault depression at present, which indicates that this method is feasible for studying the time efficiency of oil and gas transportation in oil-source faults.
【作者单位】：东北石油大学地球科学学院;
【基金】：国家自然科学基金项目“断层岩水压张裂漏油主控因素及张性破裂压力预测”(编号:41372154)资助
【分类号】：P618.13

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