梨树断陷探井试油商业油气流标准研究
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摘要
油气勘探按照市场经济的要求运作之后,要求及时评价探井试油获得的油气发现是否具有商业价值,我国原有探井工业油气流标准已不适应当前经济条件下油气勘探评价工作需要,应根据本地区的勘探开发特点建立相应的探井试油商业油气流标准。为此,以松辽盆地梨树断陷为例,根据盈亏平衡原理,利用现金流法,结合影响商业价值的开发规律及钻井投资、操作成本、油气价格等因素综合考虑后,建立单井开发初期经济极限产量计算模型,并分析转开发井的探井试油资料数据建立试油产量与单井经济极限产量的关系,从而确定地区不同类型油气藏探井试油商业油气流标准。研究结果表明:①梨树断陷试油商业油气流标准要比《计算规范》中规定的油气流标准要高得多,说明《计算规范》在梨树断陷的不适应性;②商业油气流与油(气)藏类型、地质特征、市场价格等关系密切,不同类型油(气)藏的商业油气标准相差较大,只有在系统分析各探区勘探开发实际资料基础上,才能更加合理地确定探井试油(气)成果的商业价值;③在求取单井初期平均日产量与测试产量关系过程中,油藏一般能求取比较可靠的对应计算关系式,气藏需要采用试气稳定产量折算压差下的产量或者无阻流量折算代替来计算。
In this paper, the Lishu Fault Depression in the Songliao Basin was taken as an example. A calculation model for the economic limit rate of single well in the initial stage of development was established by means of cash flow method, according to the break even principle, after the development laws influencing commercial value,the drilling investment, the operation cost and the oil/gas price were analyzed comprehensively. In addition, the relation between the test production rate and the single-well economic limit rate was built up by analyzing the well test data of the exploration well transformed into the development well, so as to determine the standards on the commercial oil and gas flow of exploration wells during well test in different types of oil and gas reservoirs. And the following research results were obtained. First, the standard on the commercial oil and gas flow during well test in the Lishu fault depression is superior to the oil and gas flow standard stipulated in the Calculation Norm, indicating that the Calculation Norm is not applicable to the Lishu fault depression. Second, the commercial value of the well test achievements of exploration wells cannot be determined rationally unless the actual exploration and development data of each exploration area is analyzed systematically. Third, when the relation between single-well initial average daily production and test production rate is being calculated, for oil reservoirs, the reliable calculation expression can be obtained, but for gas reservoirs, the calculation shall be replaced with the production rate under the converted pressure difference of stable test production rate or the absolute open flow.
In this paper, the Lishu Fault Depression in the Songliao Basin was taken as an example. A calculation model for the economic limit rate of single well in the initial stage of development was established by means of cash flow method, according to the break even principle, after the development laws influencing commercial value,the drilling investment, the operation cost and the oil/gas price were analyzed comprehensively. In addition, the relation between the test production rate and the single-well economic limit rate was built up by analyzing the well test data of the exploration well transformed into the development well, so as to determine the standards on the commercial oil and gas flow of exploration wells during well test in different types of oil and gas reservoirs. And the following research results were obtained. First, the standard on the commercial oil and gas flow during well test in the Lishu fault depression is superior to the oil and gas flow standard stipulated in the Calculation Norm, indicating that the Calculation Norm is not applicable to the Lishu fault depression. Second, the commercial value of the well test achievements of exploration wells cannot be determined rationally unless the actual exploration and development data of each exploration area is analyzed systematically. Third, when the relation between single-well initial average daily production and test production rate is being calculated, for oil reservoirs, the reliable calculation expression can be obtained, but for gas reservoirs, the calculation shall be replaced with the production rate under the converted pressure difference of stable test production rate or the absolute open flow.
引文
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[2]郭元岭,赵乐强,蒋有录,等.济阳坳陷探井商业油流标准研究[J].石油勘探与开发,2004,31(3):101-103.Guo Yuanling,Zhao Leqiang,Jiang Youlu,et al.Commercial criterion for daily output of exploratory well in the Jiyang Depression,Shengli Oilfield[J].Petroleum Exploration and Ddevelopment,2004,31(3):101-103.
[3]李洪波,张敏,李红磊.松南地区梨树断陷深层油气成藏历史分析[J].矿物岩石地球化学通报,2014,33(6):839-846.Li Hongbo,Zhang Min,Li Honglei.History of hydrocarbon accumulations in the deep of the Lishu Fault Depression,Southern Songliao Basin[J].Bulletin of Mineralogy,Petrology and Geochemistry,2014,33(6):839-846.
[4]乔文龙,李娜,熊维莉,等.准噶尔盆地不同类型气藏商业气流标准研究[J].新疆石油天然气,2013,9(4):53-59.Qiao Wenlong,Li na,Xiong Weili,et al.Study on standards of commercial gas flow of different gas reservoir types in Junggar Basin[J].Xinjiang Oil&Gas,2013,9(4):53-59.
[5]高成全.商业油流标准确定方法探讨[J].新疆石油地质,2002,23(3):254-256.Gao Chengquan.An approach for determination of commercial oil-gas flow standard[J].Xinjiang Petroleum Geology,2002,23(3):254-256.
[6]中国石油化工股份有限公司商业油(气)流标准计算规范[Z].北京:中国石油化工股份有限公司油田勘探开发事业部,2016.Standard calculating code for commercial oil&gas flow in Sinopec[Z].Beijing:Oil-field Exploration and Development Division of SINOPEC,2016.
[7]国土资源部.石油天然气储量计算规范:DZ/T0217-2005[S].北京:中华人民共和国国土资源部,2005.National Territory Rresources Department of the People's Republic of China.Regulation of Petroleum Reserves Estimation:DZ/T0217-2005[S].Beijing:National Territory Rresources Department of the People's Republic of China,2005.
[8]刘晓冬,宋旭.现金流量法在油气储量经济评价中的应用[J].天然气工业,2006,26(7):142-144.Liu Xiaodong,Song Xu,Application of cash flow method in oil/gas reserves economic assessment:taking the Block Zhao 40 as an example[J].Natural Gas Industry,2006,26(7):142-144.
[9]李继成,李洪成,尹永光.商业与工业油气流关系及与井深变化趋势[J].吐哈油气,2007,17(2):195-197.Li Jicheng,Li Hongcheng,Yin Yongguang.Relations between commercial folw,industrial flow and well depth[J].Tuha Oil&Gas,2007,17(2):195-197.
[10]Petroleum Society of the Canadian Institute of Mining Metallurgy and Petroleum.Determination of oil and gas reserves[M].王永祥,等.北京:石油工业出版社,2012.