發(fā)布時間：2018-04-14 17:20

  本文選題：YHC井 + 白堊系氣藏　； 參考：《天然氣地球科學》2017年03期

【摘要】：作為國內(nèi)為數(shù)不多的未進行系統(tǒng)油氣勘探、開發(fā)的大型古—中生代多旋回疊合沉積盆地,YHC1井氣藏的突破勢必將引領銀額盆地進一步的勘探投入,促進銀額盆地新區(qū)塊、新層系油氣的新發(fā)現(xiàn),從而使其成為未來的勘探重點。通過地質(zhì)與地球物理方法相結合,鉆測井、地震、古生物、地球化學等資料"四位一體",首次對銀額盆地YHC1井白堊系氣藏形成的地質(zhì)環(huán)境進行了深入的研究,尤其是在地層展布、構造發(fā)育、烴源巖特征、沉積儲層分析、成藏模式及遠景意義等方面取得了如下重要成果和新認識:1研究區(qū)發(fā)育2套主要目的層系——中生界白堊系K、上古生界C—P,其中白堊系整體分布廣、厚度大,哈日凹陷、拐子湖凹陷是它的主要發(fā)育地區(qū),YHC1井位于沉積中心,保證了YHC1白堊系氣藏地層體系的完整性。2研究區(qū)內(nèi)呈現(xiàn)"凹凸相間"的構造格局,斷裂均為正斷層,多集中在各凹陷的中央,控凹邊界斷裂控制著研究區(qū)的構造格局和沉積體系發(fā)育,形成北北東走向的單斷箕狀凹陷,促進了YHC1井白堊系氣藏儲集空間的形成。3白堊系沉積時期YHC1井一直處于良好的有效烴源巖富集區(qū),烴源巖成熟度好,生烴潛力大,其巴音戈壁組發(fā)育的大套深灰色—黑色含灰泥巖成為該氣藏形成最重要的基石。4白堊系發(fā)育的沉積體系為水下扇、扇三角洲、辮狀河、辮狀河三角洲、湖泊和火成巖相,YHC1井優(yōu)勢體系多為半深湖—深湖沉積體系,決定了有機物的轉化、保存以及儲層發(fā)育的環(huán)境。5鉆井揭示白堊系沉積時期,YHC1井偶見Ⅲ類和Ⅳ類儲層,多以Ⅴ類(非)儲層出現(xiàn)。6YHC1井巴音戈壁組出氣層段可能為裂縫貫通及溶蝕孔洞的含碳酸鹽質(zhì)泥巖氣藏體系,推斷屬源內(nèi)成藏的特殊巖性油氣藏。
[Abstract]:As one of the few non-systematic oil and gas exploration in China, the breakthrough of YHC1 well gas reservoir in the large Paleo-Mesozoic multi-cycle superimposed sedimentary basin is bound to lead to further exploration investment and promote the new block of Yinying basin.The new discovery of oil and gas in the new strata makes it the focus of exploration in the future.Through the combination of geology and geophysics, the geological environment of Cretaceous gas reservoir formation of YHC1 well in Yinyou Basin is studied for the first time by drilling logging, seismic, paleontology, geochemistry and other data "four-in-one".Especially in stratigraphic distribution, structural development, source rock characteristics, sedimentary reservoir analysis,The reservoir formation model and its prospective significance have obtained the following important achievements and new understanding of the development of two sets of major target strata, namely, the Mesozoic Cretaceous Kand, the Upper Paleozoic C-P, in which the Cretaceous has a wide distribution, a large thickness, and a Hari sag.Kuizihu sag is its main development area, well YHC1 is located in the center of sedimentation, which ensures the integrality of stratigraphic system of YHC1 Cretaceous gas reservoir in the "concave and convex" tectonic pattern, and the faults are normal faults.Most of them are concentrated in the center of each sag, and the boundary faults control the development of tectonic framework and sedimentary system in the study area, forming a single-faulted dustpan sag with NNE strike.The formation of reservoir space of Cretaceous gas reservoir in YHC1 well. 3. During the Cretaceous sedimentary period, YHC1 well has been in a good effective source rock accumulation area, with good hydrocarbon source rock maturity and great hydrocarbon generation potential.The large set of dark gray-black mudstone formed in the Bayingobi formation is the most important cornerstone of the formation of the gas reservoir. The sedimentary systems of Cretaceous system are subaqueous fan, fan delta, braided river, braided river delta, and braided river delta.The dominant systems of lake and igneous facies in YHC1 well are mostly semi-deep lacustrine-deep lake sedimentary systems, which determine the organic matter transformation, preservation and reservoir development. The environmental .5 well drilling reveals that there are occasionally 鈪，

本文編號：1750302