基于地质导向的河流相储集层模式识别与随钻调整策略
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摘要
河流相储集层横向变化快往往导致水平井砂岩钻遇率较低而降低水平井的产能优势,因此需要利用地质导向技术并结合地震资料对水平井实施过程中钻遇砂体发育模式进行解析。对于河流相储集层而言,不同成因类型在随钻过程中所表现出砂泥剖面的测井曲线特征存在差异:"砂体拼接"型模式钻遇砂泥岩界面往往表现为砂泥"突变"的电性特征;"微构造"型模式钻遇砂泥岩界面表现为"渐变"的电性特征;"浅着陆"型模式钻遇泥岩界面可以表现出多种电性特征。通过不同的电性特征可以进一步识别河流相储集层的边界面发育模式及储集层内部砂体拼接状况。基于对地质模式的识别,采用相应的随钻调整策略,可有效提高河流相储集层水平段砂体钻遇率。
Rapidly lateral change in fluvial facies reservoirs is often the cause of low sandstone drilling rate and reduced productivity advantage of horizontal wells.Therefore,it is necessary to analyze the development mode of drilling sand bodies during horizontal well implementation by geosteering technology and seismic data.For fluvial facies reservoirs,different genetic types show different log characteristics of sandstone and shale section in the drilling process.Sand body splicing sandstone and shale section appears as the electrical characteristics of sandstone and shale mutations;drilling sandstone and shale at microtectonics changes show a gradual electrical characteristics;drilling shale at shallow landing depth exhibits a variety of electrical characteristics.Diverse electrical characteristics help identify boundary surface development model of fluvial facies reservoirs and sand body splicing inside reservoirs.Identification based on geological models and corresponding adjustment strategy while drilling effectively improve the sand body drilling rate in horizontal section of the fluvial facies reservoirs.
Rapidly lateral change in fluvial facies reservoirs is often the cause of low sandstone drilling rate and reduced productivity advantage of horizontal wells.Therefore,it is necessary to analyze the development mode of drilling sand bodies during horizontal well implementation by geosteering technology and seismic data.For fluvial facies reservoirs,different genetic types show different log characteristics of sandstone and shale section in the drilling process.Sand body splicing sandstone and shale section appears as the electrical characteristics of sandstone and shale mutations;drilling sandstone and shale at microtectonics changes show a gradual electrical characteristics;drilling shale at shallow landing depth exhibits a variety of electrical characteristics.Diverse electrical characteristics help identify boundary surface development model of fluvial facies reservoirs and sand body splicing inside reservoirs.Identification based on geological models and corresponding adjustment strategy while drilling effectively improve the sand body drilling rate in horizontal section of the fluvial facies reservoirs.
引文
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[2]韩大匡.中国油气田开发现状、面临的挑战和技术发展方向[J].中国工程科学,2010,12(5):51-57.HAN Dakuang.Status and challenges for oil and gas field development in China and directions for technology development[J].Strategic Study of CAE,2010,12(5):51-57.
[3]MIALL A D.Architectural elements and bounding surfaces in fluvial deposits:anatomy of the Kayenta Formation(Lower Jurassic),Southwest Colorado[J].Sedimentary Geology,1988,55(3/4):233-262.
[4]李一超,王志战,秦黎明,等.水平井地质导向录井关键技术[J].石油勘探与开发,2012,39(5):620-626.LI Yichao,WANG Zhizhan,QIN Liming,et al.Key surface logging technologies in horizontal geo-steering drilling[J].Petroleum Exploration and Development,2012,39(5):620-626.
[5]秦宗超,刘迎贵,邢维奇,等.水平井地质导向技术在复杂河流相油田中的应用:以曹妃甸11-1油田为例[J].石油勘探与开发,2006,33(3):378-382.QIN Zongchao,LIU Yinggui,XING Weiqi,et al.Application of geosteering technique of horizontal well in complex fluvial reservoir:a case from Caofeidian 11-1Oilfield[J].Petroleum Exploration and Development,2006,33(3):378-382.
[6]杨子超,邵建中,邱永志.TK238H井旋转地质导向钻井技术[J].石油钻探技术,2005,33(2):60-61.YANG Zichao,SHAO Jianzhong,QIU Yongzhi.Application of rotary geasteering drilling technique to TK238H Well[J].Petroleum Drilling Techniques,2005,33(2):60-61.
[7]郭太现,杨庆红,黄凯,等.海上河流相油田高效开发技术[J].石油勘探与开发,2013,40(6):708-715.GUO Taixian,YANG Qinghong,HUANG Kai,et al.Techniques for high-efficient development of offshore fluvial oilfields[J].Petroleum Exploration and Development,2013,40(6):708-715.
[8]南山,殷凯.地质油藏随钻技术在渤海水平分支井钻进中的应用[J].中国海上油气,2004,16(5):332-336.NAN Shan,YIN Kai.Applications of geological reservoir technique while drilling of horizontal multilateral well in Bohai sea[J].China Offshore Oil and Gas,2004,16(5):332-336.
[9]郝建明,吴健,张宏伟.应用水平井资料开展精细油藏建模及剩余油分布研究[J].石油勘探与开发,2009,36(6):730-737.HAO Jianming,WU Jian,ZHANG Hongwei.Study on fine reservoir modeling and distribution of remaining oil with data of horizontal wells[J].Petroleum Exploration and Development,2009,36(6):730-737.
[10]杨鸿,陈东,夏宏泉.井眼轨迹与钻遇地层关系的随钻测井解释研究[J].国外测井技术,2006,21(2):15-17.YANG Hong,CHEN Dong,XIA Hongquan.Logging while drilling interpretation study on the relationship between borehole path and drilled formation[J].World Well Logging Technology,2006,21(2):15-17.
[11]郭琼,马红,姬月风,等.综合解释方法在水平井地质导向中的应用[J].录井工程,2008,19(3):12-15.GUO Qiong,MA Hong,JI Yuefeng,et al.Application of comprehensive interpretation method in geosteering of horizontal well[J].Mud Logging Engineering,2008,19(3):12-15.
[12]孙金浩.水平井地质导向及解释技术研究及应用[J].国外测井技术,2010,25(4):14-19.SUN Jinhao.Research and application of horizontal well geosteering and interpretation technology[J].World Well Logging Technology,2010,25(4):14-19.
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