發(fā)布時間：2018-05-15 21:15

  本文選題：天然氣 + 主控因素　； 參考：《東北石油大學(xué)》2017年碩士論文

【摘要】：徐家圍子斷陷是松北深層天然氣的主要勘探區(qū),特別是發(fā)育于斷陷中部沙河子組烴源巖之上的營城組地層,是天然氣藏集中分布的區(qū)域。隨著勘探程度的不斷完善,天然氣的勘探形勢日益嚴(yán)峻,深層火山巖、礫巖儲層物性分布復(fù)雜,常規(guī)的儲層預(yù)測技術(shù)已經(jīng)不能滿足勘探開發(fā)要求,這就迫切需要對天然氣藏條件的差異性及其主控因素有一個深入透徹的研究,對后期天然氣藏的高效合理開發(fā)具有重要貢獻價值。本文以徐家圍子興城區(qū)塊營城組為研究對象,以現(xiàn)有的地質(zhì)、地震、測井、錄井、地化、取樣、試氣資料為基礎(chǔ);以石油地質(zhì)學(xué)、地球物理學(xué)、沉積地質(zhì)學(xué)、構(gòu)造地質(zhì)學(xué)及層序地層學(xué)等為理論指導(dǎo);以非線性空變子波寬頻帶井約束多參數(shù)儲層反演處理技術(shù)為研究手段,對天然氣成藏條件、氣藏類型與分布規(guī)律以及天然氣藏主控因素開展研究。綜合研究取得如下結(jié)論及認識:研究區(qū)沙河子組熱演化史表明,深層斷陷現(xiàn)今地層的Ro大都超過了2.0%,處于高過成熟階段,有機質(zhì)已大量向烴類轉(zhuǎn)化。深層烴源巖樣品有機質(zhì)類型大多以Ⅲ型為主,有機質(zhì)成熟度沙河子組和營城組都達到過成熟階段,烴源巖已經(jīng)經(jīng)歷了大量生、排烴期,目前有生烴潛力的源巖潛也是以生氣為主。研究區(qū)氣藏類型為構(gòu)造-巖性氣藏,氣藏內(nèi)部由于儲層不均質(zhì),連通性差,以營四段礫巖儲層和營一段火山巖頂面風(fēng)化殼儲層為主要含氣層。營四段礫巖氣層無底水,邊水亦不明顯;營一段火山巖氣水層垂向分布為上氣下水,有明顯的邊水。天然氣藏的形成及分布多重因素控制,源巖控制著天然氣的分布范圍和排氣強度,生氣量與烴源巖發(fā)育密切相關(guān),烴源巖厚度大的斷陷生氣潛力大;儲層為天然氣藏提供儲集空間,不同層段儲層類型以及厚度不同天然氣儲集程度有差異;斷蓋配置關(guān)系控制天然氣藏聚集層位,天然氣藏絕大部分富集在登二段泥巖蓋層之下的營城組三四段儲層中,這主要是上覆蓋層橫向分布連續(xù)所致。
[Abstract]:Xujiaweizi fault depression is the main exploration area of deep natural gas in Songbei, especially the Yingcheng formation, which is developed above the source rocks of Shahezi formation in the middle of the fault depression, and is the area where the natural gas reservoirs are concentrated and distributed. With the continuous improvement of exploration degree, the exploration situation of natural gas is increasingly severe, the physical distribution of deep volcanic rock and conglomerate reservoir is complex, the conventional reservoir prediction technology can no longer meet the requirements of exploration and development. Therefore, it is urgent to have a thorough and thorough study on the difference of gas reservoir conditions and its main controlling factors, which has important contribution value to the high efficiency and reasonable development of the gas reservoir in the later stage. This paper takes Yingcheng formation in Xujiaweizi Xingcheng block as the research object, based on the existing geological, seismic, logging, geochemistry, sampling, gas testing data, petroleum geology, geophysics, sedimentary geology. The structural geology and sequence stratigraphy are used as the theoretical guidance, and the reservoir forming conditions of natural gas are studied by using the inversion processing technique of nonlinear space-variant wavelet wide-band well constrained multi-parameter reservoir. The types and distribution of gas reservoirs and the main controlling factors of natural gas reservoirs are studied. The comprehensive study has obtained the following conclusions and understandings: the thermal evolution history of Shahezi formation in the study area shows that the Ro of the present strata in the deep faulted depression is more than 2.0, which is higher than the mature stage, and the organic matter has been transformed to hydrocarbons in large quantities. Most of the organic matter types of deep source rock samples are type 鈪，

本文編號：1893965