地质工程方面外文翻译--济阳坳陷古近系一新近系地层油藏形成机制与分布规律(编辑修改稿)

地质工程方面外文翻译--济阳坳陷古近系一新近系地层油藏形成机制与分布规律(编辑修改稿)内容摘要：

he research and application of unconformity were promoted by stratigraohy and recent oil and gas accumulation theory,especially,the sequence stratigraohy pay a important role in predict of geological discontinuity . Pan zhongxiang[2‟3]referred to unconformity importance for oil and gas accumulation in 1983. Unconformity is benefit to find petroleum because it is favour of oil and gas migration and accumulation. From 1990s, the research on unconformity and accumulation effect were also be done in Tarim basin, ordos basin, Bohai bay basin and Jungar basin, a important and innovation result were be achieved . Fuguang[4， 5]， Wu kongyou[l6， 7]and Zhang jianlin[8]had noted that unconformity is not only a simple surface but also a special geology body, a migration and accumulation passageway of oil and gas. It is represent for tectonic movement, sea or lake suface change， and geologic alteration to earlier rocks． The inhomogeneity of alteration and later overlap make the a. rchitecture of unconformity. There ale three layers structure in a ideal unconformity: roof rock above unconformity, weathered clay horizon and semiweathered rock． Unconformity formation is related to denudation time， climate, elevation, tectonic movement and lithology. Two layers structure layers were formed as the weathered clay horizon was lack. Liuhua[16], Suifenggui[17], etc. divided unconformity into four types sand/mud, sand/sand, mud/mud and mud/sand . According to lithologic deploy of unconformity. They refcred that the migrating and accumulating ability of unconformity are decided by lithologic deploy of unconformity . Formation Mechanism and Distribution of PaleogeneNeogene Stratigraphic Reservoirs in Jiyang Depression 6 Panzhongxiang[239。 3], Liuxiaohant[11],Zhangkeyin[12],Chenzhonghong[14],Hedengfa,Ai huaguo[19],Wuyajun[20],Chenjianping[2239。 23], Zhangjiguang[2l], John S[26]etc . had a deep research on unconformity and refered that unconformity has an apparent controlling effect on oil and gas accumulation. In summery, five main aspects is included: charging reservoir, charging trap,charging migrating, charging accumulating and destroying reservoir. Based on physical modeling of oil migration, Lv xiuzheng Bekele thought the oil migration is followed the rule “migration through thin bed”, namely, migration through prevailing passway, otherwise anywhere in a conformity . (2)Development regularity of stratigraphic traps Overlapped and unconformity is premise of overlap and unconformity reservoir Exiting. so, this kind reservoir developed based on overlapped and unconformity trap formation first. Chensizhong proposed four conditions for developing overlap and unconformity reservoirs in 1982 based on research on the characteristics of overlapped and unconformity reservoirs and its distribution patterns. First is that Multiple overlapped and unconformity reservoir formed as a result of Multiple unconformityies and is that oil avvumulation area is above and below unconformity nearby hydrocarbon source rock. Third is that Torque subsidence of dustpan depression cause wide rang of overlap and unconformity reservoir. Fourth is that favourable overlap and unconformity reservoir lies in anticycle litbofacies fold play. Tong xiao guang referred four main controlling factors in 1983. First is time, lithology, attitude and weathering degree of prePaleogeneNeogene base rocks. Second is structure of faulted depression and movement strength． Third is overlap distribution of overlap line and feature of overlap lay above unconformity. Fourth is distribution of unconformity surface, permeability of overburden rocks above unconformity. Hujianyi [1lreferred that unconformity is the base of forming overlap and unconformity barrier trap, but not all good trap exits bearby unconformity in 1 984 and 1 986. The basic condition of forming overlap and unconformity barrier trap are six elements： three lines and three surfaces. Three lines are lithologic wedging line, layer overlap line and intended zone contour line. Three surface are Formation Mechanism and Distribution of PaleogeneNeogene Stratigraphic Reservoirs in Jiyang Depression 7 unconformity surface, adjacent rock surface of reservoir and fault surface. It exits kinds of trap types when six elementsarraies. People deeply know development regularity of overlap and unconformity trap with sequence stratigraphy spring up. Zhangshanwen[31] refer that multi. type break control overlap and unconformity trap, base on researching sequence of Zhungaer basin, Bohaibay basin and Songliao basin in 2020. Lipilong[3539] refer that tectonic and deposit control overlap and unconformity trap in 2020 and 2020. Tectonic movement cause basin up and down, formed large area exceed peel zone in edge of basin. It is benefit to form trap． Tectonic form nosing structures in basin. It is benefit to form traps, Deposit control reservoir and barrier layer forming. Yishiwei[42] propose that oil accumulation controlled three surface, lake extensive surface, unconformity surface and fault surface, according to Erlian basin, Jizhong depression overlap and inconformity reservoir characteristic. Overlap and unconformity reservoir distribution are controlled by truncation zone and overlap zone. Enriching is controlled by beneficial accumulating phase belt. (3)Oil and gas migration and accumulation mechanism of stratigraphic trap Reservoir is resuk of oil and gas migrating and accumulating in long distance, due to stratigraphic trap far from hydracarbon source rock. It is controlled by migrating dynamic, passageway, path, distance and accumulation etc. Lipilong[3539]refer that the most effective oil path is faultsand faultunconformity and faultsandunconformity pound transmit system for overlap and unconfort。