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| 1 | 广西雪峰山南缘石炭系寺门组储层特征及其控制因素显示文摘广西雪峰山南缘石炭系寺门组具有较好的油气成藏背景条件,查明寺门组储层的形成发育机制及其控制因素对该区油气勘探具有重要意义。利用野外露头、钻井和岩心资料,结合运用扫描电镜、铸体薄片、包裹体和孔-渗分析等手段,明确了广西雪峰山南缘石炭系寺门组储层的基本特征,探讨了储层发育的控制因素及优质储层形成模式和有利区分布。研究表明,寺门组储层岩石类型主要为细粒石英砂岩和岩屑质石英砂岩;储集空间包括原生粒间孔、次生溶蚀孔和裂缝;储层类型属于孔隙-裂缝型和孔隙型,整体呈低孔、低渗特征。储层质量主要受沉积、成岩及构造作用的共同控制:沿岸砂坝、砂泥质滨岸和混合坪微相控制了寺门组储层砂体的分布;强烈的压实作用是储层致密化的最主要原因,造成的孔隙损失率约85.2%;溶蚀作用使储层质量得到有效提升(增孔量约2.3%);构造裂缝极大地促进了储层的输导能力,使局部地区仍具备优质储层发育的物性条件。最后,建立了储层发育模式,预测研究区存在德胜和洛埠2个有利储层分布区。 | 刘自亮 张明何 刘四兵 王均杰 郝景宇 陈义才 周月 | 2022 | 石油与天然气地质2022，43，4： | 2 |
| 2 | Gradual Evolution from Fluvial Dominated to Tide Dominated Deltas and Channel Type Transformation: A Case Study of MPE3 Block in the Orinoco Heavy Oil Belt of the Eastern Venezuelan Basin显示文摘Based on the data of core description and sporopollen analysis,the gradual evolution of deltas in vertical direction and transition of channel types in the MPE3 block of the eastern Venezuela Basin have been surveyed by seismic phase and well logging facies interpretation.The results show that due to the great sea level rise,the sedimentary system of the Miocene Oficina Formation in the MPE3 block shifted from the distal-source sandy braided river delta to tide-affected delta,and eventually to tide-dominated delta.Vertically,during the early stage of sedimentation of Oficina Formation,the distributary channels of the delta were dominated by braided river channels.While in the later stage,as the tidal effect was gradually intensified,the channel changed from braided channel to meandering channel.On plane,as a result of differential transgression,sedimentary framework and distribution of sand bodies vary across the study area.Compared with the eastern part,the western part has more braided channels,larger channel bars,less developments of distributary bay and higher ratio of sand to mud.Whereas the braided channels in the south are larger than those in the north.It is the first time we pointed out the impact of marine transgression differences on the sedimentary facies distribution and river type transition in the study area.Factors like the structural and paleogeomorphological change,sea level variation,supply of sediments have strong influence on the evolution of sedimentary system and distribution of sandbodies.It is predicted that the major sandbody is more developed in the central south,which can guide the subsequent horizontal well development. | HUANG Wensong CHEN Heping XU Fang MENG Zheng ZHANG Fanqin WU Suwei | 2019 | Acta Geologica Sinica(English Edition)2019，93，6： | 1 |
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