本文選題：含油性　切入點：中-低成熟　出處：《石油與天然氣地質(zhì)》2017年03期

【摘要】：為揭示中-低成熟湖相富有機質(zhì)泥頁巖含油性及其賦存形式,以渤海灣盆地沾化凹陷渤南洼陷羅63井和義21井沙一段取心段為例,采用輕烴校正后的氯仿瀝青"A"含量、油飽和指數(shù)(OSI)開展了含油性定量評價,采用光薄片和掃描電鏡觀察以及多溫階熱釋分析技術(shù),開展了滯留油賦存形式定性、定量研究。結(jié)果表明,沙一段富有機質(zhì)泥頁巖含油性較好,經(jīng)輕烴校正后的氯仿瀝青"A"平均含量和油飽和指數(shù)(OSI)分別達到1.0%以上和中等含油至油氣顯示級別,個別層段達到具有頁巖油潛力級別;富有機質(zhì)泥頁巖內(nèi)滯留油除以有機顯微組分(瀝青質(zhì)體和層狀藻類體等)吸附-互溶態(tài)形式賦存外,還賦存于層理縫、構(gòu)造微裂縫、礦物粒間(晶間)孔隙、粒緣縫以及溶蝕孔隙內(nèi)。以有機質(zhì)吸附-互溶態(tài)和無機礦物吸附態(tài)賦存的重質(zhì)油占總滯留油的68%~84%(平均達75%),而以游離態(tài)賦存的輕質(zhì)和中質(zhì)油則占總滯留油的16%~32%(平均25%)。現(xiàn)實可動油量(輕烴校正量與200℃熱釋輕質(zhì)油量之和)介于0.62~1.76 mg/g(平均1.12 mg/g),可動油率(現(xiàn)實可動油量與總滯留油量之比)5.39%~9.10%(平均7.06%)。利用200℃時熱釋放的輕質(zhì)油量和輕烴校正量之和,可以較合理地對富有機質(zhì)泥頁巖層系的頁巖油資源潛力進行快速評價。
[Abstract]:In order to reveal the oil content and occurrence form of middle and low mature lacustrine mudstone shale, taking the core section of Luo 63 well and Yi 21 well sand section of Bonan sag in Zhanhua depression of Bohai Bay basin as an example, the chloroform bitumen "A" content after light hydrocarbon correction was used. Oil saturation index (OSI) carried out quantitative evaluation of oil content, and qualitative and quantitative studies on the occurrence of residual oil were carried out by means of light sheet, scanning electron microscope and multi-temperature thermoluminescence analysis. The oil content of the organic rich shale in Shayi formation is good. After light hydrocarbon correction, the average content of chloroform asphalt "A" and the oil saturation index (OSI) reach above 1.0% and medium oil content to oil and gas level respectively, and some layers reach the level of shale oil potential. In addition to organic macerals (asphaltenes, layered algae, etc.) adsorption-mutual solubilized, the remaining oil in organic shale shale also exists in stratified joints, structural micro-fractures, intergranular (intergranular) pores of minerals, etc. Grain-edge fractures and dissolved pores. Heavy oils in organic adsorption-intersoluble state and inorganic mineral adsorption state account for 680.84% of the total residual oil (an average of 7550%), while light and intermediate oils in the free state account for 160.32% of the total residual oil. The real movable oil amount (the sum of light hydrocarbon correction amount and 200 鈩，

本文編號：1694836