准噶尔盆地腹部深层储层物性保存过程多因素耦合分析

发布时间：2018-05-08 19:09

本文选题：准噶尔盆地腹部 + 三工河组　；参考：《沉积学报》2017年03期

【摘要】：准噶尔盆地腹部莫索湾地区深层三工河组储层主体埋深在3 800~4 600 m之间,但储层物性条件相对优越,是盆地腹部油气勘探和发现的重点层位之一,因此明确其优质储层物性保存多因素耦合关系及成因机理对后期油气勘探开发具有重要意义。通过岩石薄片、扫描电镜、物性、黏土矿物X衍射等分析测试及钻测井资料,在物性保存单因素分析基础上,结合地层埋藏史及区域构造演化,从多因素间演化匹配关系出发详细讨论了莫索湾地区三工河组深层优质储层的物性保存过程。结果表明:优势沉积条件、地层超压、成岩流体碱性到酸性的转变、较低的古地温,4类单因素分别使储层物性得以有效保存。而储层物性保存过程最终可划分为5个演化阶段,且在不同演化阶段物性保存的主控因素也不同。缓慢浅埋期主控因素为浅埋深和地层超压的初始形成;第一次快速深埋早—中期为地层超压;第一次快速深埋晚期至缓慢深埋早—中期由超压转变为胶结物的固结;缓慢深埋中—后期为低地温梯度及有机酸的溶蚀;第二次快速深埋—现今为超压及地温梯度的降低,并最终建立三工河组综合成岩及油气聚集模式。
[Abstract]:The main body of the reservoir of the deep three Yigu formation in the deep area of the Junggar basin is 3 800~4 600 m, but the reservoir physical condition is relatively superior, which is one of the key layers in the exploration and discovery of the basin's abdominal oil and gas. Therefore, it is clear that the multi factor coupling relationship and genetic mechanism of the physical property preservation of the high quality reservoir are important to the late oil and gas exploration and development. Through the analysis and testing of rock thin film, scanning electron microscope, physical property, clay mineral X diffraction, and drilling and logging data, on the basis of the single factor analysis of physical preservation, combined with the strata burial history and regional tectonic evolution, the physical preservation of the deep quality reservoir of the three yiguhe formation in the moxan Bay area is discussed in detail from the multi factor evolution matching relationship. The results show that the predominant deposition conditions, the overpressure of the strata, the alkaline to the acid transformation of the diagenetic fluid, the lower paleo geotemperature, the 4 kinds of single factors make the reservoir physical property effectively preserved, and the storage process of the reservoir can be divided into 5 evolutionary stages, and the main controlling factors of the physical preservation at different stages of evolution are also different. The main control factors are the initial formation of shallow buried depth and overpressure of the strata; the first rapid deep buried early to middle period is stratigraphic overpressure; the first rapid deep buried late to slow deep buried early to middle period is changed from overpressure to cementation, and the slow deep buried middle and later period is low ground temperature gradient and organic acid corrosion; the second fast deep buried - now overpressure And the reduction of geothermal gradient, and ultimately the comprehensive diagenesis and hydrocarbon accumulation pattern of the three working group.

【作者单位】：中国石油大学(北京)地球科学学院;中国石油大学(北京)油气资源与探测国家重点实验室;中国石油勘探开发研究院实验研究中心;中国石油新疆油田分公司实验检测研究院;
【基金】：国家自然科学基金项目(41272157,41672098)~~
【分类号】：P618.13

【相似文献】