史英,盖长城,颜菲,周微,曾悠悠,李彩莲
SHI Ying,GAI Changcheng,YAN Fei,ZHOU Wei,ZENG Youyou,LI Cailian

• 1:中国石油冀东油田分公司

摘要(Abstract)：

冀东油田高浅北区稠油油藏高含水油井自2010年底实施CO_2吞吐控水增油以来,取得良好效果。但首轮吞吐失效后,面临吞吐增油量逐轮减少、换油率下降、吨油成本不断上升的问题。为了有效提高吞吐措施效果,在明确CO_2吞吐控水增油机理和主要注采参数优化的基础上,以高浅北区某典型底水稠油油藏为例,考虑不同构造位置、水平井轨迹差异及不同采出程度,进行CO_2吞吐合理吞吐轮次数值模拟研究。研究表明:多轮吞吐效果主要受构造位置、井轨迹及含油饱和度的影响,高部位物性好的油井实施5轮次吞吐效果较好;腰部采出程度相对较低的油井可实施4轮吞吐;采出程度相对较高的油井、边部中部位油井可实施3轮次吞吐。矿场实践证实,该方法可减少无效措施工作量,实现多轮吞吐经济效益最优化。
Since CO_2Huff-puff stimulation in the water control and oil increment conducted for the high watercut oil wells in the heavy oil reservoirs in North Gaoqian Block of Jidong Oilfield in the end of 2010,the much better effects have achieved. But after the first non-effect cycle of the treatment,the problems showed as follows:gradual decreases for the incremental oil and oil draining/replacing ratio,and increase of the cost per ton of the oil. In order to effectively enhance the effects of the Huff and puff,on the basis of making clear of the mechanism in the water control and oil enhancement and moreover the optimizations of the main injection-production parameters,taking the typical heavy oil reservoirs with the bottom water in North Gaoqian Block as example,considering different structural locations and horizontal well trajectories and moreover the recovery factor differential,the numerical simulation researches on the reasonable cyclic times of CO_2 Huff and puff were conducted. The achievements show that the multicyclic CO_2huff-puff effects are principally influenced by the structural location,well trajectory and oil saturation. For the oil wells with much better physical properties and in the high position of the structures,the effects of five-time CO_2huff-puff is much better; while the wells with rather lower recovery percents and in the medium position of the structures,four-cycle CO_2huff-puff is adoptable; the wells with much higher recovery factors and inthe middle parts of the margins,three-cycle stimulation is reasonable. The field practice has verified that the approach can reduce the workload of the non-effect measurement and realize the optimization of the economic profits for the multicyclic huff and puff.

关键词(KeyWords)： 底水油藏;稠油;CO2吞吐;极限周期;数值模拟;冀东油田
bottom-water oil reservoir;heavy oil;CO2 Huff and puff;limit cycle;numerical simulation;Jidong Oilfield

Abstract:

Keywords:

基金项目(Foundation): 基金项目:中国石油天然气股份有限公司“南堡陆地断块油藏提高采收率技术研究与应用”(2014B-1113)

作者(Author): 史英,盖长城,颜菲,周微,曾悠悠,李彩莲
SHI Ying,GAI Changcheng,YAN Fei,ZHOU Wei,ZENG Youyou,LI Cailian

参考文献(References)：

• [1]高慧梅,何应付,周锡生.注二氧化碳提高原油采收率技术研究进展[J].特种油气藏,2009,16(1):6-11.
• [2]江怀友,沈平平,卢颖.CO2提高世界油气资源采收率现状研究[J].特种油气藏,2010,17(2):5-10.
• [3]张国强,孙雷,孙良田,等.小断块单元油藏单井多周期CO2吞吐强化采油[J].大庆石油地质与开发,2006,25(5):85-89.
• [4]Tian S B,Shun L.Investigating the Effect of Steam CO2and Surfactant on the Recovery of Heavy Oil Reservoirs[R].SPE117394,2008.
• [5]Wo S,Whitman L D,Steidtmann J R.Estimates of Potential CO2Demand for CO2EOR in Wyoming Basins[R].SPE 122921,2009.
• [6]鹿腾,李兆敏,刘伟.强水敏稠油油藏CO2吞吐技术研究[J].西南石油大学学报(自然科学版),2012,34(6):151-154.
• [7]马香丽,陈秋华,姚庆君,等.CO2单井吞吐技术在濮城油田的先导试验[J].试采技术,2010,31(1):12-20.
• [8]李国永,叶盛军,冯建松,等.复杂断块油藏水平井二氧化碳吞吐控水增油技术及其应用[J].油气地质与采收率,2012,19(4):62-65.
• [9]孙凯.辽河油田欧37区块CO2吞吐试验研究[J].长江大学学报(自然版),2014,11(20):90-95.
• [10]刘怀珠,李良川,吴均.浅层断块油藏水平井CO2吞吐增油技术[J].石油化工高等学校学报,2014,27(4):52-56.
• [11]赵彬彬,郭平,李闽,等.CO2吞吐增油机理及数值模拟研究[J].大庆石油地质与开发,2009,28(2):117-120.
• [12]孙雷,庞辉,孙扬,等.浅层稠油油藏CO2吞吐控水增油机理研究[J].西南石油大学学报(自然科学版),2014,36(6):88-94.
• [13]张朝富,刘滨,蒲玉娥,等.稠油油藏CO2吞吐参数优化[J].新疆石油地质,2011,32(5):528-530.
• [14]陈民锋,姜汉桥,吴应川,等.复杂断块油藏单井吞吐注采参数优化研究[J].油气田地面工程,2008,27(11):1-3.
• [15]战菲,宋考平,尚文涛,等.低渗透油藏单井CO2吞吐参数优选研究[J].特种油气藏,2010,17(5):70-72.
• [16]王飞,王涛.稠油油藏CO2吞吐参数优选室内实验[J].石油化工应用,2013,32(2):72-75.