Application of seismic waveform indicator inversion for low-permeability reservoirs prediction in Zhujiang Formation of the EA Oilfield
-
摘要:
低渗储层预测是油气勘探开发的难点。阳江凹陷EA油田珠江组油层是典型的低渗储层，这类储层普遍具有砂体横向变化快、连续性差、单砂体规模较小、低孔低渗的特征，传统的地震反演方法对于这类储层的反演精度较低。为了获得高精度反演结果，采用地震波形指示反演方法，以地震波形的横向变化代替变差函数，通过井震结合进行高分辨率储层预测。首先，在确定使用渗透率曲线作为敏感曲线的基础上，通过覆压校正和拟合得到样品的覆压孔隙度和覆压渗透率；然后，根据岩性、填充物的不同建立3个渗透率模型，求得渗透率曲线；最后，利用渗透率曲线进行波形指示反演得到反演结果，计算各主力层砂体厚度。研究结果和盲井检验表明，地震波形指示反演提高了储层横向、纵向的预测精度，能够成功预测砂体边界、砂体厚度，预测结果可为油气勘探的进一步开发提供依据。
Abstract:The prediction of low-permeability reservoir is always a tough issue in exploration and development. The Zhujiang Formation of the EA Oilfield in the Yangjiang Depression is a typical low-permeability reservoir. The reservoir is generally characteristic of rapid lateral change and poor continuity of sand body. The single sand body features low porosity and low permeability. The accuracy of traditional seismic inversion for this type of reservoir is low. To obtain high-precision inversion results, the method of seismic waveform indicator inversion was adopted, and the lateral change of seismic waveform instead of the variation function was used. First, on the basis of using the permeability curve as a sensitive curve, the overmolding porosity and overmolding permeability of the sample were obtained by overmolding correction and fitting. Secondly, according to the difference of lithology and filler, three permeability models were established to obtain permeability curves. Finally, the permeability curve was used to invert the waveform indicator to obtain the inversion result and sand body thickness. Results show that the seismic waveform indicator inversion could improve the lateral and vertical prediction accuracy of the reservoir, and it could be successfully predict the sand body boundary and sand body thickness. The forecast results provided a guidance for additional oil and gas exploration and development.
-
-
表 1 预测厚度与实际厚度对比
Table 1. Comparison between predicted thickness andreal thickness
m 砂层 EA-1井 EA-2井 实际厚度 预测厚度 预测误差 实际厚度 预测厚度 预测误差 ZJ11 24.7 21.9 −2.8 18.7 18.5 −0.2 ZJ12 7.0 8.0 1.0 7.0 7.8 0.8 ZJ14 9.0 8.3 −0.7 12.1 9.9 −2.2 ZJ17 12.0 13.7 1.7 12.5 14.4 1.9 ZJ21 11.3 10.4 −0.9 8.1 10.1 2.0 ZJ25 6.1 3.5 −2.6 6.5 4.7 −1.8 ZJ27 6.3 8.2 1.9 7.0 8.1 1.1 ZJ31 3.2 2.6 −0.6 3.5 4.4 −0.9 ZJ33 7.2 6.0 −1.2 7.3 2.0 −0.3 
下载: 导出CSV
-
[1] 张雷,姜勇,侯志强,等. 西湖凹陷低孔渗储层岩石物理特征分析及叠前同步反演地震预测[J]. 中国海上油气,2013,25(2):36-39.
[2] 秦德文,姜勇,侯志强,等. 叠前同步反演技术在西湖凹陷低孔渗储层“甜点”预测中的应用[J]. 油气藏评价与开发,2015,5(6):12-15. doi: 10.3969/j.issn.2095-1426.2015.06.003
[3] 张明,郝杰,付兴深,等. 南堡凹陷南堡4-3区低渗砂岩储层预测[J]. 石油地球物理勘探,2018,53(1):164-169. doi: 10.13810/j.cnki.issn.1000-7210.2018.S1.027
[4] 梁杰,陈维涛,罗明,等. 地震波形指示反演在珠江口盆地A油田薄层预测中的应用[J]. 物探化探计算技术,2019,41(3):327-333. doi: 10.3969/j.issn.1001-1749.2019.03.07
[5] 孔省吾,张云银,沈正春,等. 波形指示反演在灰质发育区薄互层浊积岩预测中的应用:以牛庄洼陷沙三中亚段为例[J]. 物探与化探,2020,44(3):665-671.
[6] 李亚哲,王力宝,郭华军,等. 基于地震波形指示反演的砂砾岩储层预测:以中拐—玛南地区上乌尔禾组为例[J]. 岩性油气藏,2019,31(2):134-142. doi: 10.12108/yxyqc.20190215
[7] 彭光荣,张向涛,许新明,等. 南海北部珠江口盆地阳江凹陷油气勘探重要发现与认识[J]. 中国石油勘探,2019,24(3):267-279. doi: 10.3969/j.issn.1672-7703.2019.03.001
[8] 鲁宝亮,王璞珺,张功成,等. 南海北部陆缘盆地基底结构及其油气勘探意义[J]. 石油学报,2011,32(4):580-587. doi: 10.7623/syxb201104004
[9] 田立新,张向涛,彭光荣,等. 珠江口盆地阳江凹陷石油地质特征及成藏主控因素[J]. 中国海上油气,2020,32(1):13-22.
[10] 杨海长,徐建永,武爱俊,等. 珠三坳陷阳江凹陷构造特征及其对油气成藏的影响[J]. 海洋石油,2011,31(2):20-24. doi: 10.3969/j.issn.1008-2336.2011.02.020
[11] 高君,毕建军,赵海山,等. 地震波形指示反演薄储层预测技术及其应用[J]. 地球物理学进展,2017,32(1):142-145. doi: 10.6038/pg20170119
[12] 晁彩霞,于俊峰,王玉,等. 基于地震波形指示反演的东方B气田海底扇砂体精细刻画[J]. 海相油气地质,2021,26(3):281-288. doi: 10.3969/j.issn.1672-9854.2021.03.010
[13] 陈彦虎,陈佳. 波形指示反演在煤层屏蔽薄砂岩分布预测中的应用[J]. 物探与化探,2019,43(6):1254-1261.
[14] 谢春临,李永义,陈志德,等. 波形指示模拟在致密油水平井钻探中的应用[J]. 石油地球物理勘探,2021,56(3):564-573,414. doi: 10.13810/j.cnki.issn.1000-7210.2021.03.015
[15] 张琬璐. 波形指示反演技术方法研究及应用[J]. 非常规油气,2019,6(3):21-25. doi: 10.3969/j.issn.2095-8471.2019.03.004
[16] 顾雯,徐敏,王铎翰,等. 地震波形指示反演技术在薄储层预测中的应用:以准噶尔盆地B地区薄层砂岩气藏为例[J]. 天然气地球科学,2016,27(11):2064-2069. doi: 10.11764/j.issn.1672-1926.2016.11.2064
[17] 张广智, 王丹阳, 印兴耀. 利用MCMC方法估算地震参数[J]. 石油地球物理勘探, 2011, 46（4）: 605-609, 667, 496-497.
[18] 韩长城,林承焰,任丽华,等. 地震波形指示反演在东营凹陷王家岗地区沙四上亚段滩坝砂的应用[J]. 中国石油大学学报(自然科学版),2017,41(2):60-69. doi: 10.3969/j.issn.1673-5005.2017.02.007
[19] 邓泳,杨龙,李琼,等. 准噶尔盆地二叠系芦草沟组致密油岩心覆压孔渗变化规律研究[J]. 岩性油气藏,2015,27(1):39-43. doi: 10.3969/j.issn.1673-8926.2015.01.006
-
图(11)
表(1)
计量
- 文章访问数: 461
- PDF下载数: 121
- 施引文献: 0