【摘要】：近年來(lái),鉻微凝膠驅(qū)油技術(shù)在大慶油田取得了良好的開(kāi)發(fā)效果,己經(jīng)成為油田開(kāi)發(fā)的一項(xiàng)重要技術(shù)。為進(jìn)一步明確鉻微凝膠驅(qū)油技術(shù)在應(yīng)用過(guò)程中的選井選層原則,規(guī)范參數(shù)設(shè)計(jì)標(biāo)準(zhǔn),本文針對(duì)大慶薩南油田儲(chǔ)層物性特征和流體性質(zhì),結(jié)合靜態(tài)成膠性能評(píng)價(jià)和物理模擬實(shí)驗(yàn)結(jié)果,開(kāi)展了鉻微凝膠調(diào)驅(qū)體系與薩南二、三類(lèi)油層配伍性室內(nèi)研究。實(shí)驗(yàn)結(jié)果表明,大慶油田清水配制污水稀釋的鉻微凝膠體系成膠性能良好,能夠保證鉻微凝膠體系在地層中的成膠性能。靜態(tài)成膠推薦配方:聚合物550mg/L+交聯(lián)劑濃度70mg/L。鉻微凝膠體系在流動(dòng)條件(5層25目不銹鋼篩網(wǎng)層循環(huán)流動(dòng))下能夠成膠,動(dòng)態(tài)剪切條件下推薦配方:聚合物950mg/L+交聯(lián)劑濃度90mg/L。鉻微凝膠體系在注入井附近地層的高流速區(qū)不會(huì)成膠,體系注入性良好,在注入過(guò)程不會(huì)造成近井堵塞堵塞。鉻微凝膠體系具有良好的液流轉(zhuǎn)向作用和深部調(diào)驅(qū)功能,能避免高滲透層段過(guò)早突破而發(fā)生竄流,良好的液流轉(zhuǎn)向能力可使物性相對(duì)較差的中、低滲透層位得以有效動(dòng)用。與鉻微凝膠體系配伍的油層最低滲透率界限為100×10-3μm2。鉻微凝膠與聚合物交替注入工藝一方面可發(fā)揮鉻微凝膠的深度液流轉(zhuǎn)向作用,另一方面又能利用聚合物的流度控制作用提高驅(qū)油效果。三管并聯(lián)巖心驅(qū)替實(shí)驗(yàn)中,當(dāng)交替輪次為4輪次,鉻微凝膠段塞尺寸為0.05PV,聚合物段塞尺寸為0.06PV,候凝時(shí)間為3天,聚合物段塞采用低濃+高濃的形式時(shí),采收率提高值為24.52%。通過(guò)確定鉻微凝膠體系的最佳注入?yún)?shù),可在油田開(kāi)發(fā)過(guò)程中實(shí)現(xiàn)降本增效的目的,對(duì)于知道油田現(xiàn)場(chǎng)實(shí)際開(kāi)發(fā)有一定指導(dǎo)意義。
[Abstract]:In recent years, chromium microgel flooding technology in Daqing oilfield has achieved good development results, has become an important oil field development technology. In order to further clarify the principle of well selection and reservoir selection in the application of chromium microgel flooding technology, and to standardize the design standard of parameters, this paper aims at the physical and fluid properties of reservoir in Sanan Oilfield, Daqing. Based on the static gelling performance evaluation and physical simulation results, the compatibility of chromium microgel flooding system with Sanan 2 and 3 oil layers was studied in laboratory. The experimental results show that the chrome microgel system diluted with clean water in Daqing Oilfield has good gelation property and can guarantee the gelation property of chromium microgel system in stratum. Recommended formula for static gelation: polymer concentration of 550 mg / L crosslinking agent 70 mg / L. Chromium microgel system can form glue under flow condition (5 layers 25 mesh stainless steel screen layer circulating flow). Under dynamic shear condition, the formula is recommended: the concentration of polymer 950mg / L crosslinking agent 90 mg / L. The chromium microgel system does not form glue in the high velocity zone near the injection well, and the injection property of the system is good, and the near well blockage will not be caused during the injection process. Chromium microgel system has good liquid flow steering function and deep adjusting flooding function. It can avoid premature breakthrough of high permeability layer and lead to channeling. Good liquid flow turning ability can make the low permeability layer can be used effectively in the relatively poor physical properties. The minimum permeability limit of the reservoir compatible with chromium microgel system is 100 脳 10 ~ (-3) 渭 m ~ (2). The alternating injection process of chromium microgel and polymer can play the role of deep liquid flow turning of chromium microgel on the one hand, and improve the oil displacement effect on the other hand by using the mobility control of polymer. In the experiment of three-pipe parallel core displacement, when the alternating cycle is 4 times, the size of chromium microgel slug is 0.05 PVV, the size of polymer slug is 0.06 PVV, the waiting time is 3 days, and the polymer slug adopts the form of low concentration and high concentration, the enhanced recovery efficiency is 24.52%. By determining the optimal injection parameters of chromium microgel system, the purpose of reducing cost and increasing efficiency can be realized in the process of oilfield development, and it is of certain guiding significance to know the actual development of oil field.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TE357.46
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本文編號(hào)：2133639