【摘要】：短半徑側(cè)鉆水平井增產(chǎn)技術(shù)是老井恢復(fù)產(chǎn)能、老油田挖潛增效的經(jīng)濟有效手段。隨著渤海油田勘探開發(fā)的不斷深入,剩余油分布復(fù)雜,井間、層間矛盾不斷加劇,部分在生產(chǎn)油田年遞減率達到8～10%,并存在海上油田生產(chǎn)井控制儲層面積有限的問題。進一步挖潛剩余油,提高油田的產(chǎn)能,又能降低開發(fā)成本是渤海油田開發(fā)的關(guān)鍵環(huán)節(jié)。針對海上油田平臺井槽數(shù)有限且多為定向井和水平井等特征,根據(jù)儲層物性特征,減少對儲層污染,同時滿足國家環(huán)保法規(guī)要求,實現(xiàn)在原井眼中一趟鉆套管開窗側(cè)鉆并滿足短半徑井眼軌跡要求,研究了區(qū)域構(gòu)造特征和儲層物性特征,攻關(guān)了叢式井大斜度高曲率一趟鉆側(cè)鉆開窗、軟地層短半徑側(cè)鉆鉆井工藝、短半徑井眼與鉆完井管柱剛度適應(yīng)性設(shè)計方法、大曲率小井眼防砂、固井防砂一體化等系列關(guān)鍵技術(shù),融合創(chuàng)新以上的研究成果,集成一套解決綏中36油田開發(fā)調(diào)整中海上外掛槽口難、生產(chǎn)井控制儲層面積有限、開發(fā)投資高、產(chǎn)量遞減快的適合短半徑側(cè)鉆增產(chǎn)的技術(shù)體系。本文通過在編制渤海綏中36油田短半徑側(cè)鉆增產(chǎn)方案中,以目前渤海油田開發(fā)和老油田調(diào)整增產(chǎn)技術(shù)為前提,根據(jù)其區(qū)域地層較為疏松,造斜困難、且短半徑軌道造斜段要求高造斜率特點,需要高造斜率和滯后的測量間距,使軌道沒有可回旋的余地,需研究馬達鉆具組合中的近鉆頭測斜功能,確保鉆完井管柱要滿足大曲率小井眼的要求,同時保證其剛性、結(jié)構(gòu)必須適應(yīng)曲率變化。根據(jù)區(qū)域儲層流體性質(zhì),基于其周邊剩余油分布模式及完善注采井網(wǎng)需求,為滿足均衡驅(qū)替及注采平衡何后期提液生產(chǎn)要求,研究具有與大曲率小井眼井段匹配的完井防砂工藝,以及固井防砂一體化工藝。應(yīng)綜合鉆井、力學(xué)、數(shù)學(xué)與決策論等進行全面規(guī)劃研究,優(yōu)化短半徑側(cè)鉆增產(chǎn)方案,科學(xué)實現(xiàn)經(jīng)濟有效挖潛剩余油,最大幅度提高采收率目標(biāo)。
[Abstract]:The short radius sidetracking horizontal well is an economic and effective means to restore the productivity of the old well and to tap the potential and increase the efficiency of the old oil field. With the deepening of exploration and development in Bohai Oilfield, the distribution of remaining oil is complicated, and the contradiction between wells and layers is becoming more and more serious. The annual decline rate of some oil fields is up to 8% 10%, and the problem of controlling reservoir area of production wells in offshore oil fields is limited. The key link of Bohai oilfield development is to further tap the remaining oil, improve the production capacity and reduce the development cost. In view of the limited number of platform wells in offshore oil fields and their characteristics such as directional wells and horizontal wells, according to the physical characteristics of the reservoir, the pollution to the reservoir is reduced, and the requirements of the national environmental protection laws and regulations are met at the same time. The sidetracking and sidetracking of the casing in the original hole is realized and meets the requirements of the short radius well trajectory. The regional structural characteristics and reservoir physical properties are studied, and the key problems of the cluster well with large slope and high curvature are studied. A series of key technologies, such as short radius sidetracking drilling technology, stiffness adaptability design method of short radius borehole and drilling and completion string, sand control with large curvature and small hole, and integration of cementing and sand control, are integrated with the above research achievements. Integrating a set of technical systems suitable for short radius side drilling to increase production of Suizhong 36 oilfield, such as difficult offshore external slot, limited reservoir area controlled by production wells, high investment in development and fast decline of production. In this paper, based on the present development of Bohai oilfield and the adjustment of production increase technology in old oil field, according to the loose formation in the region, it is difficult to make the slope by compiling the short radius sidetracking stimulation plan of Suizhong 36 oilfield in Bohai Sea. And the short radius track slant section requires the characteristics of high slope making rate, high slope making rate and lag measuring distance, so that the track has no room for gyration, so it is necessary to study the function of measuring deviation of near bit in the motor drilling tool assembly. To ensure that the string of drilling and completion should meet the requirements of small hole with large curvature and its rigidity, the structure must adapt to the change of curvature. According to the fluid property of regional reservoir, based on the distribution pattern of remaining oil and the demand of perfect injection-production pattern, to meet the requirements of balanced displacement and injection-production equilibrium, The completion sand control technology with matching with large curvature and small hole section and the integrated cementing sand control technology are studied. Comprehensive planning and research should be carried out on comprehensive drilling, mechanics, mathematics and decision theory, optimization of short radius sidetracking production plan, scientific realization of economic and effective tapping of remaining oil, and maximum increase in oil recovery.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE52

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