【摘要】：在針對遼河油田砂巖油層和低壓裂縫性潛山油層的勘探開發(fā)中,使用常規(guī)水基鉆井液存在嚴重漏失問題,鉆井工藝研究院研制出了抗高溫可循環(huán)微泡沫鉆井液體系。油田儲量累計達3.75億噸,占油田可采儲量(10.856億噸)的34.56%,其中壓力系數(shù)低于0.8的儲量約9382萬噸,占油田可采儲量的8.64%。對于壓力系數(shù)低于1.0的低壓地層的開發(fā),現(xiàn)在有諸多技術:水平鉆井技術、充氣鉆井液技術或水平泡沫鉆井液,但這些技術在現(xiàn)場應用過程中都存在不同問題,為了解決這些問題,參照國外已于上世紀90年代開的油田分支水平鉆井液技術研究,用于低壓、衰竭、裂縫性地層及大裂縫型硬地層的鉆探,在提高鉆井速度,降低鉆井費用,減少污染等方面取得了較好效果。迄今為止,國內未見系統(tǒng)研究油田分支水平鉆井液的報道。本文通過調研國內外在泡沫鉆井液方面所做的工作及所采取的措施,研究適合于地層壓力系數(shù)較低條件下的分支水平鉆井液;優(yōu)選(或合成)分支水平鉆井液所使用的化學處理劑(如起泡劑等),確定分支水平鉆井液的配方;進行分支水平鉆井液的發(fā)泡及消泡處理技術研究;進行泡沫流體的壓縮性、流動性、抗溫性、抗鹽性及抗污染性能試驗研究,確定其參數(shù)控制技術;進行分支水平鉆井液現(xiàn)場施工工藝研究及相關設備的配套試驗,逐步完善分支水平鉆井液的配方,形成油田分支水平鉆井液的現(xiàn)場施工工藝方案;現(xiàn)場試驗,完成研究內容。并結合遼河油田的地層特性,制定了詳細的施工措施,提出油田分支水平鉆井液技術,旨在解決充氣鉆井液及一次性泡沫鉆井難以解決的低壓問題和一次性泡沫因排放造成的環(huán)境污染與成本增加問題,為欠平衡鉆井技術的配套完整提供強有的技術支撐,該鉆井液密度低,有利于提高鉆速,可以作為解決超低壓地層的井漏及油層保護難題的技術。在現(xiàn)場應用一次取得成功,產(chǎn)生了良好的經(jīng)濟和社會效益。
[Abstract]:In the exploration and development of sandstone reservoirs and low pressure fractured buried hill reservoirs in Liaohe Oilfield, there is a serious leakage problem in using conventional water-based drilling fluid, and the drilling fluid system is developed by drilling Technology Research Institute. The accumulative reserves of oil fields are 375 million tons, accounting for 34.56 tons of recoverable reserves (1.0856 billion tons), among which the reserves with pressure coefficient below 0.8 are about 93.82 million tons, accounting for 8.64 tons of recoverable reserves. For the development of low pressure formation with pressure coefficient below 1.0, there are many technologies: horizontal drilling technology, aerated drilling fluid technology or horizontal foam drilling fluid, but there are different problems in the field application of these technologies. In order to solve these problems, referring to the research on the horizontal drilling fluid technology of the branched oil fields, which has been developed in the last century, it is used in the drilling of low pressure, failure, fractured and large fractured hard formations. It can improve the drilling speed and reduce the drilling cost. Good results have been achieved in reducing pollution and so on. Up to now, no systematic study of the branch level drilling fluid has been reported in China. By investigating the work and measures taken in foam drilling fluid at home and abroad, this paper studies the branch horizontal drilling fluid suitable for low formation pressure coefficient. The chemical treatment agent (such as foaming agent) used to select (or synthesize) branched horizontal drilling fluid, determine the formula of branching horizontal drilling fluid, study foaming and defoaming treatment technology of branched horizontal drilling fluid, and carry out the compressibility of foam fluid, Fluidity, temperature resistance, salt resistance and pollution resistance are tested and studied to determine the parameter control technology, and the field construction process of branched horizontal drilling fluid and related equipment are studied to improve the formulation of branched horizontal drilling fluid. The field construction technology scheme of oilfield branch horizontal drilling fluid is formed, and the field test is carried out to complete the research content. Combined with the formation characteristics of Liaohe Oilfield, the detailed construction measures are worked out, and the branch horizontal drilling fluid technology is put forward. In order to solve the problem of low pressure and environmental pollution and cost increase caused by discharge of one-off foam, which is difficult to solve in inflatable drilling fluid and one-off foam drilling, and to provide strong technical support for the complete matching of underbalanced drilling technology, The low density of the drilling fluid is beneficial to improve the drilling speed and can be used as a technique to solve the problem of well leakage and reservoir protection in ultra-low pressure formation. It has been successfully applied in the field once and has produced good economic and social benefits.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE254

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相關期刊論文 前1條

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本文編號：2130890