發(fā)布時(shí)間：2018-04-26 16:18

  本文選題：斷層性質(zhì) + 沉積差異性�。� 參考：《石油實(shí)驗(yàn)地質(zhì)》2017年05期

【摘要】：陡坡帶砂礫巖體油藏是斷陷盆地油氣勘探的主要類型之一。鉆井證實(shí),渤海灣盆地濟(jì)陽坳陷近EW向斷層下降盤近源粗碎屑沉積物發(fā)育,而N(N)E向斷層下降盤近源沉積欠發(fā)育或不發(fā)育。針對(duì)這一特殊地質(zhì)現(xiàn)象,在凸起區(qū)剝蝕量恢復(fù)的基礎(chǔ)上,探討了凸起與凹(洼)陷的耦合關(guān)系,劃分出凸隆凹降型和凹降凸隆型2種關(guān)系類型;以現(xiàn)代沉積考察為依據(jù),提出物源區(qū)面積、剝蝕厚度以及物源溝谷發(fā)育程度等是近源沉積物發(fā)育與否的主控因素;研究了EW向斷層和N(N)E向斷層下降盤的沉積特點(diǎn),指出在古近紀(jì)SN向拉張應(yīng)力狀態(tài)下,EW向斷層屬于同沉積斷層,NNE向斷層以右旋走滑作用為主,運(yùn)動(dòng)學(xué)性質(zhì)和活動(dòng)時(shí)間的不同是沉積差異性的主因。
[Abstract]:Gravel-rock reservoir in steep slope zone is one of the main types of oil and gas exploration in faulted basin. The drilling results show that the coarse clastic sediments near the EW fault descending plate in Jiyang depression, Bohai Bay basin, are developed, while those near the N(N)E fault descending plate are underdeveloped or undeveloped. In view of this special geological phenomenon, on the basis of the recovery of denudation in the uplift region, the coupling relationship between the uplift and the concave (depression) depression is discussed, and two kinds of relation types, the convex and concave descending type and the concave convex uplift type, are divided into two types, which are based on the modern sedimentary investigation. It is suggested that the area of provenance area, denudation thickness and the development degree of provenance gully are the main controlling factors for the development of near-source sediments, and the sedimentary characteristics of EW fault and N(N)E fault descending plate are studied. It is pointed out that the EW fault belongs to the same sedimentary fault and the NNE fault is mainly dextral strike-slip under the condition of the extensional stress in the SN direction of Paleogene. The difference in kinematics and activity time is the main cause of the sedimentary difference.
【作者單位】： 中國石化勝利油田分公司油氣勘探管理中心;中國石化勝利油田分公司勘探開發(fā)研究院;
【基金】：國家重大科技專項(xiàng)(2016ZX05006-003)資助
【分類號(hào)】：P618.13

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