準(zhǔn)噶爾盆地春光探區(qū)油氣微生物指示
本文選題:春光探區(qū) + 微生物勘探; 參考:《石油學(xué)報(bào)》2017年07期
【摘要】:油氣微生物勘探具有有效、直接、經(jīng)濟(jì)的技術(shù)特點(diǎn),日益受到全球油氣勘探界的重視。以準(zhǔn)噶爾盆地春光探區(qū)為研究對(duì)象,在探區(qū)北部橫穿稀油區(qū)(T23井沙灣組)和稠油區(qū)(T10井—T17井白堊系)部署了一條微生物地球化學(xué)勘查剖面,分別采集微生物勘探樣品和化探樣品120件。同時(shí)在探區(qū)西南部油藏上方部署一塊采樣區(qū),采集微生物勘探樣品243件。采用平板菌落法培養(yǎng)分析樣品中油氣指示微生物的數(shù)量,結(jié)合油藏和鉆井信息研究微生物異常分布特征。結(jié)果顯示,剖面上油氣微生物數(shù)量與酸解烴含量的分布與下伏油藏及背景區(qū)有很高的吻合度,兩者在油藏上方呈頂端異常模式,剖面南北兩端形成低值背景區(qū)。此外,結(jié)合石油地質(zhì)及鉆井信息探討了油氣微生物平面分布規(guī)律:平面上微生物異常分布集中,與油藏聚集體吻合度較高,在高產(chǎn)油流井T45-1井、T33井、T22井及T67井區(qū)形成了高值異常區(qū),其中T67井微生物高值區(qū)鉆井部署較少,需加大勘探力度。微生物異常與鉆井對(duì)比顯示,兩者符合率達(dá)70%以上。春光探區(qū)油氣微生物指示初探表明,微生物對(duì)油藏中輕烴組分的微滲漏具有有效指示性,與下伏油藏具有較高響應(yīng)關(guān)系。在實(shí)際勘探中,微生物勘探結(jié)果應(yīng)與石油地質(zhì)、地震、鉆井等資料相結(jié)合,為油氣富集區(qū)預(yù)測(cè)、鉆前評(píng)價(jià)和鉆井部署提供有力依據(jù)和建議。
[Abstract]:Microbial exploration of oil and gas has been paid more and more attention by the world because of its effective, direct and economical technical characteristics. Taking Chunguang exploration area of Junggar Basin as the object of study, a microbiological geochemical exploration profile has been deployed in Shawan formation of well T23 and Cretaceous system of well T17 of well T10 in the north of the exploration area. A total of 120 samples were collected from microbiological exploration and geochemical exploration respectively. At the same time, a sampling area was deployed above the reservoir in the southwest of the exploration area, and 243 samples of microbial exploration were collected. The quantity of oil and gas indicating microorganisms in the samples was analyzed by plate colony method, and the abnormal distribution characteristics of microbes were studied by combining reservoir and drilling information. The results show that the distribution of oil and gas microorganisms and acidolysis hydrocarbon content in the profile is highly consistent with the underlying reservoir and the background area, both of them show a top anomaly pattern above the reservoir, and a low value background area is formed at the north and south ends of the profile. In addition, combined with petroleum geology and drilling information, the plane distribution law of oil and gas microorganism is discussed: the abnormal distribution of microorganism on the plane is concentrated, and the degree of agreement with reservoir aggregates is high. High value anomaly zones were formed in well T45-1 and well T67 in well T45-1, well T33 and well T67, in which the drilling of microorganism in high value area of well T67 is less, so it is necessary to intensify exploration. The comparison of microbial anomaly and drilling shows that the coincidence rate of both is over 70%. The preliminary study on microorganism indication of oil and gas in Chunguang exploration area shows that microorganism is effective indicator for microleakage of light hydrocarbon component in reservoir and has a high response to underlying reservoir. In actual exploration, microbial exploration results should be combined with petroleum geology, earthquake and drilling data to provide strong basis and suggestions for prediction, pre-drilling evaluation and drilling deployment in oil-gas rich areas.
【作者單位】: 成都理工大學(xué)油氣藏地質(zhì)及開發(fā)工程國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)石油化工股份有限公司石油勘探開發(fā)研究院無錫石油地質(zhì)研究所;
【基金】:國(guó)家自然科學(xué)基金項(xiàng)目(No.41202241)資助
【分類號(hào)】:P618.13;P632.4
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