致密油“甜点”多属性融合预测技术
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摘要
新疆准噶尔盆地J凹陷致密油储层存在"甜点"预测不准、单井产量差异大的问题,影响油田规模效益开发。通过系统分析研究区钻井与地震等大量基础数据,确定了影响"甜点"预测的5个关键属性,并对属性进行分类和RGB颜色融合分析,得到"地质甜点"和"工程甜点"预测结果,进一步融合得到综合"甜点"区,并由此形成了致密油"甜点"多属性融合预测技术。研究区勘探评价井压裂后的生产效果表明,勘探开发评价井压裂效果和综合"甜点"区预测结果吻合程度较高。在此基础上,2017年,在Ⅰ类综合"甜点"区部署2口水平井,压裂改造后效果良好,进一步验证了"甜点"多属性融合预测技术的可靠性。该"甜点"预测技术准确可靠,对致密油后期开发评价及产能建设井位部署具有很强的指导作用。
There are some problems such as inaccurate prediction of"sweets"and large differences in single well production in tight oil reservoirs of J sag in the Junggar Basin,Xinjiang Uygur Autonomous Region,which affect the scale benefit development of the oil fields. Based on the systematic analysis of a large number of drilling and seismic basic data of the study area,5 key attributes affecting the prediction of"sweets"were determined; the attributes were classified and RGB color fusion analysis was carried out on them,and the"geologic sweet"and"engineering sweet"prediction results were obtained; by means of further fusion,the integrated"sweet zone"was obtained,and the multi-attribute fusion prediction technique for tight oil "sweets"was formed accordingly. The production response after fracturing of exploration appraisal well in the study area shows that the fracturing effect of exploration and development appraisal well is in good agreement with the prediction results of the integrated"sweet zone". On the basis of which,2 horizontal wells were drilled in class I integrated"sweet zone"in 2017,and the effect after fracturing stimulation was good,further confirming the reliability of multi-attribute fusion prediction technique for tight oil"sweets". The"sweet"prediction technique is accurate and reliable,and can play a strong guiding role in the later development evaluation and well allocation for productivity construction of tight oil reservoir.
There are some problems such as inaccurate prediction of"sweets"and large differences in single well production in tight oil reservoirs of J sag in the Junggar Basin,Xinjiang Uygur Autonomous Region,which affect the scale benefit development of the oil fields. Based on the systematic analysis of a large number of drilling and seismic basic data of the study area,5 key attributes affecting the prediction of"sweets"were determined; the attributes were classified and RGB color fusion analysis was carried out on them,and the"geologic sweet"and"engineering sweet"prediction results were obtained; by means of further fusion,the integrated"sweet zone"was obtained,and the multi-attribute fusion prediction technique for tight oil "sweets"was formed accordingly. The production response after fracturing of exploration appraisal well in the study area shows that the fracturing effect of exploration and development appraisal well is in good agreement with the prediction results of the integrated"sweet zone". On the basis of which,2 horizontal wells were drilled in class I integrated"sweet zone"in 2017,and the effect after fracturing stimulation was good,further confirming the reliability of multi-attribute fusion prediction technique for tight oil"sweets". The"sweet"prediction technique is accurate and reliable,and can play a strong guiding role in the later development evaluation and well allocation for productivity construction of tight oil reservoir.
引文
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[5]温庆志,蒲春生,曲占庆,等.低渗透、特低渗透油藏非达西渗流整体压裂优化设计[J].油气地质与采收率,2009,16(6):102-104,107.
[6]史晓东.非均质致密油储层水平井体积压裂产能预测[J].特种油气藏,2016,4(1):54-56.
[7]任岚,林然,赵金洲,等.基于最优SRV的页岩气水平井压裂簇间距优化设计[J].天然气工业,2017,4(37):69-79.
[8]潘林华,张士诚,程礼军,等.水平井“多段分簇”压裂簇间干扰的数值模拟[J].天然气工业,2014,34(1):74-79.
[9]张平,赵金洲,郭大立,等.水力压裂裂缝三维延伸数值模拟研究[J].石油钻采工艺,1997,19(3):68-72.
[10]李绪宣,朱振宇,张金淼.中国海油地震勘探技术进展与发展方向[J].中国海上油气,2016,28(1):1-12.
[11]王卫萍,王勤华,陈汉林,等.薄储层测井解释的影响因素及对策[J].断块油气田,2013,20(2):262-267.
[12]曹辉.关于地震属性应用的几点认识[J].油气藏评价与开发,2002,25(5):18-22.
[13]刘依谋,印兴耀,张三元,等.宽方位地震勘探技术新进展[J].石油地球物理勘探,2014,49(3):596-610.
[14]刘振武,撒利明,董世泰,等.地震数据采集核心装备现状及发展方向[J].石油地球物理勘探,2013,48(4):663-675.
[15]张延玲,杨长春,贾曙光.地震属性技术的研究和应用[J].地球物理学进展,2005,20(4):1129-1133.