本文關(guān)鍵詞： 隔離液 抗高溫 高密度 流變相容 膠結(jié)強(qiáng)度　出處：《天津工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：油基鉆井液具有抗高溫性強(qiáng),潤滑性能好,儲層保護(hù)性能好以及頁巖抑制性能高等特點(diǎn),特別適用于頁巖氣井、超深井、大斜度定向井等或具有水敏性等復(fù)雜地層特性的固井作業(yè)中。針對油基鉆井液,普通的隔離液已經(jīng)無法起到很好的驅(qū)替作用,因此我們需要開發(fā)性能更加優(yōu)異的隔離液體系。這種隔離液體系需具有:和泥漿、水泥漿有良好的相容能力;可依據(jù)實(shí)際施工情況調(diào)節(jié)自身的密度范圍;對套管沒有腐蝕作用;可以在較低的環(huán)形空間上返速下達(dá)到紊流狀態(tài)從而有效帶出鉆井液等特點(diǎn)。因此,研發(fā)這樣一套性能優(yōu)異、實(shí)用性廣的驅(qū)油型隔離液具有十分重要的意義。本課題研究以沖洗液為基液,通過與懸浮劑、加重劑及其它添加劑以不同比例、不同工藝程序復(fù)配得到適用于驅(qū)替高密度油基鉆井液的抗高溫隔離液。通過靜態(tài)、動(dòng)態(tài)抗高溫性能測試測定其抗溫能力;通過懸浮穩(wěn)定性研究測試其沉降密度差是否在合理范圍內(nèi),并優(yōu)選可在高溫條件下使用的懸浮劑:分別測定隔離液與固井一二界面的膠結(jié)強(qiáng)度,其在有效驅(qū)替鉆井液以及隔離水泥漿后,不能對套管與地層的膠結(jié)強(qiáng)度產(chǎn)生不良影響;通過包括流變性、抗污染稠化試驗(yàn)、抗壓強(qiáng)度以及降失水能力的測試,確定其流變相容性,保證其與鉆井液、水泥漿相容性良好,不會(huì)使水泥漿產(chǎn)生絮凝、提前增稠等現(xiàn)象。在完成實(shí)驗(yàn)室性能測試后,應(yīng)用于固井現(xiàn)場,考察其實(shí)際使用能力。實(shí)驗(yàn)結(jié)果表明,所研發(fā)的驅(qū)油型隔離液體系最高抗溫能力可達(dá)160℃,密度范圍可在1.0-2.40g/cm~3調(diào)節(jié),與水泥漿、鉆井液相容性良好,頂替效率高�，F(xiàn)場試驗(yàn)一口井,固井質(zhì)量良好。
[Abstract]:The oil-base drilling fluid has the characteristics of strong resistance to high temperature, good lubricity, good reservoir protection and high shale inhibition, etc. It is especially suitable for shale gas wells and ultra-deep wells. In cementing operations with high inclination directional wells or complex formation characteristics such as water sensitivity, ordinary isolating fluids can no longer play a good displacement role for oil-based drilling fluids. Therefore, we need to develop an isolation liquid system with better performance. The isolated liquid system should have good compatibility with mud and cement slurry, adjust its density range according to the actual construction conditions, and have no corrosive effect on casing. It can reach the turbulent state in the lower annular space, which can effectively bring out the drilling fluid and so on. Therefore, the development of such a set of excellent performance, It is of great significance to use the widely used oil displacement isolating fluid. In this paper, the flushing solution is used as the base liquid, and the proportion of the liquid is different from the suspension, weight and other additives. High-temperature isolating fluid suitable for displacement of high-density oil-based drilling fluid was obtained by mixing different process procedures. The temperature resistance was measured by static and dynamic high-temperature resistance test. The suspension stability is studied to test whether the settlement density difference is within a reasonable range, and the suspension agent that can be used at high temperature is selected: the cementation strength between the isolating fluid and the cementing interface is measured respectively. After effectively displacing drilling fluid and isolating cement slurry, it can not adversely affect the cementation strength of casing and formation. Through tests including rheology, anti-pollution thickening test, compressive strength and water loss reduction ability, Determine its rheological compatibility, ensure that it has good compatibility with drilling fluid and cement slurry, do not cause flocculation of cement slurry, advance thickening, etc. After completing the laboratory performance test, it is used in cementing field, The experimental results show that the maximum temperature resistance of the oil displacement type isolated liquid system can reach 160 鈩，

本文編號：1550328