辫状河三角洲前缘储层特征及非均质性研究——以渤海湾J油田东块沙河街组为例
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摘要
利用岩心、测井和生产动态信息等资料,对渤海湾盆地J油田东块沙河街组辫状河三角洲前缘储层特征及非均质性进行深入剖析。结果表明:目的层砂体以中-粗粒岩屑长石砂岩为主,岩石成分成熟度较低,分选度和磨圆度中等,主要发育粒间孔隙,毛管压力曲线形态以I类偏粗歪度为主,属于中、高孔渗储层。目的层层内、层间、平面非均质性均较强;层内渗透率突进系数最大平均值高达5.54,且识别出4种渗透率韵律特征;层间渗透率最大相差249倍,且各小层岩性存在较大差异;平面渗透率主要受沉积作用控制,渗透率向远离水下分流河道中心方向逐渐减小,由水下分流河道—河口坝—席状砂渗透率依次变差。该研究成果为油田储层地质建模和优化注水方案研究提供大力地质支持,促使J油田能够合理高效开发。
This paper presents the reservoir and the heterogeneity characteristics researches of the Braided river delta front on the east JX Oilfield of the Bohai Basin based on cores analysis, logging interpretation parameters and production dynamics data. The reservoir of target stratum is mainly composed of medium to coarse lithic feldspathic sandstone, with low rock composition maturity, medium separation and grinding of particles, mainly developed intergranular pores, and with type I curve shape of capillary pressure as major, which belongs to the reservoir with medium to high degree of porosity and permeability.A high permeability heterogeneity characteristic show in the inter layer, interlamination and plane reservoirs. The permeability of inter layer reservoir show four kinds of rhythm features and with a highest permeability heterogeneity coefficient average of 5.54. Large difference of lithology among the substratum sand body, the maximum difference permeability is 249 times. The sedimentation processes control the plane heterogeneity of the substratum, the permeability is increasing toward the distributary channel, and decreasing from distributary channel to mouth bar to sheet sand. The results of the research provide strong support to reservoir geological modeling and optimizing water injection scheme in oil field,and the TX Oilfield could be developed and exnlnited in a reasonable and efficient way.
This paper presents the reservoir and the heterogeneity characteristics researches of the Braided river delta front on the east JX Oilfield of the Bohai Basin based on cores analysis, logging interpretation parameters and production dynamics data. The reservoir of target stratum is mainly composed of medium to coarse lithic feldspathic sandstone, with low rock composition maturity, medium separation and grinding of particles, mainly developed intergranular pores, and with type I curve shape of capillary pressure as major, which belongs to the reservoir with medium to high degree of porosity and permeability.A high permeability heterogeneity characteristic show in the inter layer, interlamination and plane reservoirs. The permeability of inter layer reservoir show four kinds of rhythm features and with a highest permeability heterogeneity coefficient average of 5.54. Large difference of lithology among the substratum sand body, the maximum difference permeability is 249 times. The sedimentation processes control the plane heterogeneity of the substratum, the permeability is increasing toward the distributary channel, and decreasing from distributary channel to mouth bar to sheet sand. The results of the research provide strong support to reservoir geological modeling and optimizing water injection scheme in oil field,and the TX Oilfield could be developed and exnlnited in a reasonable and efficient way.
引文
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[21]张琴,朱筱敏,李桂秋.东营凹陷古近系沙河街组碎屑岩储集层非均质性与油气意义[J].古地理学报,2007,9(6):661-668.
[2]孙红杰,金宝强,杨志成,等.海上中深层断块油田滚动开发研究及实践-以J油田沙河街组为例[J].海洋石油,2016,2(36):56-61.
[3]强昆生,吕修祥,周心怀,等.渤海海域北部JX1-1反转构造与油气成藏关系[J].天然气地球科学,2013,2(24):329-334.
[4]余一欣,周心怀,徐长贵,等.渤海辽东湾坳陷金县构造变换带发育特征[J].现代地质,2013,5(27):999-1004.
[5]肖锦泉,李坤,胡贺伟,等.辽东湾坳陷辽中凹陷金县1-1油田构造特征与油气成藏[J].天然气地球科学,2014,3(25):333-340.
[6]邓津辉,周心怀,魏刚,等.郯庐走滑断裂带活动特征与油气成藏的关系-以金县地区为例[J].石油与天然气地质,2008,1(29):102-106.
[7]肖二莲.辽东湾JX油田东三段沉积相与储层特征研究[D].青岛:中国海洋大学,2008.
[8]杨志成,宋洪亮,郑华,等.渤海Q油田沙河街组精细地质研究实践[J].重庆科技学院学报(自然科学版),2016,4(18):62-65.
[9]张文凯,邹黎明,谢丹,等.渤海湾盆地金县1-1构造烃源岩地化特征及评价[J].天然气技术与经济,2015,5(9):1-4.
[10]梁家驹.辽中凹陷JX1-1油田油气成藏规律研究[D].成都:成都理工大学,2011.
[11]戴亚权,赵俊英,罗静兰,等.安塞油田坪桥地区长2段储层非均质性研究[J].西北大学学报(自然科学版),2010,40(2):287-298.
[12]汪文,李维锋,高阳,等.辫状河三角洲前缘储层非均质性评价[J].长江大学学报(自然科学版),2012,9(5):61-63.
[13]姜香云,吴胜和,王绍华.大港油田官104断块储层非均质性研究[J].地球物理学进展,2007,22(5):1446-1453.
[14]刘克奇,杨喜峰,杨春梅.东濮凹陷卫城81断块沙四段第二砂层组储层非均质性研究[J].断块油气田,2004,11(4):55-57.
[15]封从军,单启铜,时维成,等.扶余油田泉四段储层非均质性及对剩余油分布的控制[J].中国石油大学学报(自然科学版),2013,37(1):1-7.
[16]李军辉,柳成志,卢双舫,等.复杂断块储层非均质性研究-以辽河油田沈84-安12块Es33段为例[J].吉林大学学报(地球科学版),2008,38(2):757-764.
[17]郑亚斌,王延斌,邓宝荣,等.港172断块储层特征研究[J].特种油气藏,2007,14(4):26-35.
[18]高硒,刘明博.中山川地区延长组长6储层特征及非均质性研究[J].地下水,2014,36(3):207-212.
[19]张代燕,孔垂显,孟祥超,等.玛北斜坡区百口泉组扇三角洲储层特征[J].新疆地质,2016,34(2):250-256.
[20]孙美静,刘杰,程国秀,等.塔里木盆地天山南地区古近系储层特征及其控制因素[J].油气地质与采收率,2013,20(4):33-36.
[21]张琴,朱筱敏,李桂秋.东营凹陷古近系沙河街组碎屑岩储集层非均质性与油气意义[J].古地理学报,2007,9(6):661-668.