【摘要】：伊通、王府、德惠以及讓字井區(qū)塊巖心均屬于超低滲巖心,其中王府、德惠區(qū)塊以及讓字井區(qū)塊巖心滲透率基本處于納達西級別。研究區(qū)塊以致密油、氣臧為主,巖石幾乎沒有滲流能力。根據(jù)油田儲層特征以及壓裂施工情況,將吉林油田生產區(qū)域(伊通、王府、德惠、讓字井區(qū)塊)的超低滲巖心進行造縫處理,模擬天然裂縫的網狀縫類型和模擬人造壓裂裂縫的單縫類型,使造縫后巖心滲透率集中在50～100×10-3μm2,巖心滲流能力提高。對四個研究區(qū)塊的儲層巖心分別進行了粘土礦物和全巖礦物分析,并根據(jù)巖性理論研究預測各儲層的敏感性。具體情況如下：讓字井區(qū)塊泉四段全巖礦物含量為石英45.8%,鉀長石8.4%,斜長石25.1%,方解石5.3%,粘土礦物含量為15.4%,其中伊利石在粘土礦物的絕對含量中占3.39%左右、伊/蒙混層在2.77%左右、高嶺石在0%、綠泥石在9.24%左右、蒙脫石為0%；吉林油田伊通雙二段層位的全巖礦物測試結果：石英為91.7%,粘土礦物含量為8.3%,其中伊利石在粘土礦物的絕對含量中占3.57%左右、伊/蒙混層4.48%左右、高嶺石0%、綠泥石0.25%左右、蒙脫石為0%；德惠區(qū)塊雙河子組全巖礦物含量為石英52.1%,鉀長石4.3%,斜長石27.6%,方解石3.2%,粘土礦物含量為12.8%,其中伊利石在粘土礦物的絕對含量中占3.58%左右、伊/蒙混層4.48%左右、高嶺石0%、綠泥石4.74%左右、蒙脫石為0%；王府區(qū)塊泉四段全巖礦物含量為石英38.3%,斜長石20.3%,方解石21.4%,硬石膏2.4%,粘土礦物含量為17.6%,其中平均粘土礦物絕對含量中伊利石在5.28%左右、伊/蒙混層在9.15%左右、高嶺石在0%、綠泥石在3.17%左右、蒙脫石為0%。通過室內儲層敏感性的評價分析實驗,評價分析各區(qū)塊地層的速敏、鹽敏、水敏、酸敏、堿敏、應敏以及溫敏,得到儲層各種敏感實驗的結論為：讓子井區(qū)塊,泉四段油層是強速敏、中等偏弱水敏、中等偏強酸敏、弱堿敏、強應敏、強溫敏特性的油層。伊通區(qū)塊,雙二段油氣層是具有中等偏強速敏、中等偏強水敏、弱酸敏、弱堿敏、強應敏、中等偏強溫敏的敏感特性油氣層。德惠區(qū)塊,沙河子組氣層是具有強速敏、強水敏、中等偏弱酸敏、弱堿敏、強應敏、強溫敏的敏感特性氣層。王府區(qū)塊氣層是具有強速敏、強水敏、弱酸敏、強堿敏、強應敏、強溫敏的敏感特性氣層。通過對各種工作液在吉林油田研究區(qū)塊運用過程中的傷害機理進行研究,可知無論是外來流體本身對地層孔滲結構的影響,還是由于孔滲結構的外部原因發(fā)生的改變,本質上都會產生敏感傷害,最終也都會造成油相滲透率降低,孔隙堵塞,進而影響油、氣井的產量并且傷害儲層。但是通過結合油田地層敏感性評價結果以及油氣層相關的地質特征,在弄清儲層特征及工作液對地層造成潛在傷害的原因的基礎上,有針對性的研究適應吉林油田的四種儲層保護型工作液體系(壓井液、射孔液、洗井液、防水鎖劑),會發(fā)現(xiàn)儲層保護型工作液對儲層造成傷害后的滲透率恢復值均大于95%,具有很好的保護儲層的作用,可以有效地提升油、氣井的開發(fā)。根據(jù)室內實驗結合現(xiàn)場施工分析研究發(fā)現(xiàn),在各項施工過程中,利用具有針對性的工作液體系并結合敏感性評價結果的建議進行施工,可以達到較高水平的保護儲層的效果。
[Abstract]:The core of Yitong, Wangfu, Dehui and zetzai block belong to ultra low permeability core. The core permeability of Wangfu, Dehui block and zetzang block is basically at the Na Da West level. The research area is so that dense oil, gas Zang is the main reservoir, and the rock has almost no percolation capacity. According to the reservoir characteristics and the fracturing construction, the Jilin oilfield is born. The ultra low permeability core of the production area (Yitong, Wangfu, Dehui, Yoshi block) is seamed to simulate the network seam type of the natural fracture and the single fracture type of the artificial fracture. The core permeability after the seam is concentrated at 50~100 * 10-3 Mu m2, the core percolation ability is higher. The core of the reservoir rock of the four research blocks is respectively glued. The analysis of soil minerals and whole rock minerals and the prediction of the sensitivity of each reservoir according to the lithology theory. The specific conditions are as follows: the total rock mineral content in the four section of the block spring of zywell is 45.8% of quartz, 8.4% of potassium feldspar, 25.1% of plagioclase, 5.3% of calcite and 15.4% in clay minerals, of which about 3.39% of the absolute content of clay minerals is in the illite. The Iraq / montmorillonite layer is about 2.77%, kaolinite is 0%, chlorite is about 9.24%, and montmorillonite is 0%. The whole rock mineral test results of the Yitong double two segment of Jilin oilfield are 91.7%, clay mineral content is 8.3%, among which illite is about 3.57% in the absolute content of clay minerals, about 4.48% in Iraq / montmorillonite, 0% of kaolinite and 0. in chlorite. About 25%, montmorillonite is 0%; the total rock mineral content of the Dehui block Shuanghe Zi formation is quartz 52.1%, potassium feldspar 4.3%, plagioclase 27.6%, calcite 3.2%, and clay mineral content 12.8%, among which illite is about 3.58% in the absolute content of clay minerals, about 4.48% in Iraq / montmorillonite, 0% of kaolinite, 4.74% in chlorite, and montmorillonite as 0%. The total rock mineral content in the four section of the block spring is quartz 38.3%, plagioclase 20.3%, calcite 21.4%, anhydrite 2.4%, and clay mineral content 17.6%, of which the average clay mineral content is about 5.28%, the irony is about 9.15%, the kaolinite is 0%, and the chlorite is 3.17%, and the montmorillonite is 0%. through indoor reservoir sensitivity evaluation. The price analysis experiments have been made to evaluate and analyze the speed sensitivity, salt sensitivity, water sensitivity, acid sensitivity, alkali sensitivity, stress sensitivity and temperature sensitivity of each block formation. The conclusion of various sensitive experiments of the reservoir is that the reservoir of the sub well block and the four section of the spring are the oil layer of strong speed sensitive, medium weak water sensitivity, medium strong acid sensitivity, weak alkali sensitivity, strong sensitivity and strong temperature sensitivity. The gas layer is a sensitive gas reservoir with medium strong speed sensitivity, medium strong water sensitivity, weak acid sensitivity, weak alkali sensitivity, strong sensitivity and moderate strong Wen Min. The Dehui block, Shahe sub formation is a gas reservoir with strong speed sensitivity, strong water sensitivity, moderate weak acid sensitivity, weak alkali sensitivity, strong sensitivity and strong temperature sensitivity. The gas reservoir in Wangfu block is characterized by strong speed and strong water. Sensitive, weak acid sensitive, strong alkali sensitive, strong sensitive, and strong sensitive gas sensitive gas reservoir. Through the study of the damage mechanism of various working fluids in the study area of Jilin oilfield, it is known that both the influence of the external fluid itself on the pore structure and the change of the external cause of the porous structure will be produced in essence. Sensitive damage will eventually cause oil phase permeability decrease, pore blockage, and then affect oil and gas well production and damage reservoir. But on the basis of combining reservoir sensitivity evaluation results and oil and gas reservoir related geological characteristics, it is based on identifying the reservoir characteristics and the cause of the potential damage to the formation by the reservoir characteristics and working fluid. The study adapts to four types of reservoir protection working fluid system (well fluid, perforating fluid, well washing liquid, waterproof lock agent) in Jilin oilfield. It will be found that the recovery value of the reservoir protective working fluid is more than 95% after damage to the reservoir. It has a good function of protecting the reservoir and can effectively improve the development of oil and gas wells. It is found that in the construction process, the effect of high level of reservoir protection can be achieved in the construction process by using the proposed working liquid system and the suggestion of the sensitivity evaluation results.
【學位授予單位】：長江大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13

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