本文選題：新型油包水乳化鉆井液　切入點：性能評價　出處：《東北石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：目前,油基鉆井液在鉆井行業(yè)中發(fā)展迅猛,因為其具有抗高溫、抗鹽侵、鈣侵、潤滑性好,井壁穩(wěn)定等優(yōu)。但由于其昂貴的費用和對儲層污染的嚴(yán)重,限制其在鉆井工作中的使用。應(yīng)用水基鉆井液體系時,易發(fā)生縮徑、井壁剝落、坍塌、巖屑床堆積等復(fù)雜問題,影響勘探開發(fā)效率。在鉆遇高難度復(fù)雜井段和各種特殊工藝井時,只有使用油基鉆井液才能滿足現(xiàn)場的實際應(yīng)用。在我國經(jīng)濟可持續(xù)發(fā)展,重視生態(tài)保護的大的形勢下,鉆井行業(yè)也越來越重視對儲層的保護,對油基鉆井液在環(huán)境保護方面的要求越越來越嚴(yán)格,國內(nèi)現(xiàn)有的油基鉆井液已經(jīng)不能滿足目前的鉆井需求,這就需要研究出一套既能夠滿足鉆井需求又能夠保護儲層的新型油基鉆井液體系。本論文通過實驗研究出一套新型油包水乳化鉆井液體系。首先通過對幾種油品的性質(zhì)和來源等方面的綜合對比,確定來源較容易并有一定生物降解性的生物柴油作為新型油包水乳化鉆井液體系的基礎(chǔ)油。然后通過成膠實驗、高溫老化試驗和高溫高壓濾失試驗等方法,優(yōu)選出乳化性能好且污染小的乳化劑,成膠性好且有一定提黏提切能力的高性能有機土和高溫高壓濾失量低于5ml的復(fù)合型降濾失劑。再對該鉆井液體系進行鉆井性能評判,并優(yōu)選出各項處理劑在體系中的最優(yōu)加量。最終確定新型油包水乳化鉆井液體系的配方為:基液(生物柴油)+主乳化劑3%+輔乳化劑1%+有機土2%+降濾失劑3.5%+20%CaCl2溶液(體積20%)+3%1250目CaCO3。通過鉆井液流變性實驗,電穩(wěn)定性實驗,抗溫性能實驗,潤滑性能實驗,抗污染性能實驗,抑制性能評價實驗以及儲層保護性能評價實驗等方法,確定新型油包水乳化鉆井液具有穩(wěn)定性強,抗120℃高溫,潤滑性好,抗15%的鈣鹽和水污染的能力,巖屑回收率在98%以上的抑制頁巖水化分散能力以及滲透率恢復(fù)值在97%以上的儲層保護能力。本研究體系在滿足對高溫深井、鹽膏層等復(fù)雜地層鉆井需求的同時還滿足環(huán)保和經(jīng)濟需求,較大慶以往的油基鉆井液有了很大的改善,并通過在現(xiàn)場兩口井的應(yīng)用,鉆井液的流變性、抗溫性、濾失性等都能滿足鉆井需求。為我國更深一層開展環(huán)保油基鉆井液技術(shù)的發(fā)展奠定了理論和現(xiàn)實基礎(chǔ)。
[Abstract]:At present, oil-based drilling fluids are developing rapidly in the drilling industry because of their excellent properties such as high temperature resistance, salt invasion resistance, calcium invasion, good lubricity and wellbore stability, etc. However, due to their high cost and serious reservoir pollution, In the application of water-based drilling fluid system, complex problems such as diameter shrinkage, well wall flaking, collapse, debris bed accumulation and so on are easy to occur. It affects the efficiency of exploration and development. Only using oil based drilling fluid can satisfy the practical application in the field when drilling complex section and various special process wells. Under the situation of sustainable economic development and ecological protection in our country, The drilling industry also pays more and more attention to reservoir protection. The more stringent the requirements for environmental protection of oil-based drilling fluids are, the more the existing oil based drilling fluids in China can no longer meet the current drilling demand. Therefore, it is necessary to develop a new oil-base drilling fluid system which can satisfy the drilling demand and protect the reservoir. In this paper, a new oil-in-water emulsified drilling fluid system is studied by experiments. A comprehensive comparison of the nature and source of, The biodiesel, which is easy to come from and has certain biodegradability, is used as the base oil of the new oil-in-water emulsified drilling fluid system, and then through the gelation experiment, the high-temperature aging test and the high-temperature high-pressure filtration test, etc. The emulsifier with good emulsifying property and little pollution, high performance organic soil with good gelation property and certain viscosity raising and cutting ability, and compound filter reducer with high temperature and high pressure filtration less than 5 ml were selected. The drilling performance of the drilling fluid system was evaluated. Finally, the formula of the new oil-in-water emulsified drilling fluid system was determined as follows: base solution (biodiesel) main emulsifier 3% auxiliary emulsifier 1% organic soil 2% filter reducer 3.5% 20Cl 2. Solution (volume 20) 3 ~ (50) mesh CaCO _ 3. The rheological properties of drilling fluid were tested. The methods of electrical stability experiment, temperature resistance experiment, lubricating performance experiment, antipollution performance experiment, inhibition performance evaluation experiment and reservoir protection performance evaluation experiment, etc., determined that the new oil-in-water emulsified drilling fluid has strong stability. Resistance to 120 鈩，

本文編號：1563855