| 川西新场气田沙溪庙组浅水三角洲砂体类型与展布特征 |
| |
| 引用本文： | 高阳,胡向阳,曾大乾,赵向原,贾英,于清艳,王勇飞.川西新场气田沙溪庙组浅水三角洲砂体类型与展布特征[J].现代地质,2019,33(6):1163-1173. |
| |
| 作者姓名： | 高阳 胡向阳 曾大乾 赵向原 贾英 于清艳 王勇飞 |
| |
| 作者单位： | 1.中国石化石油勘探开发研究院,北京 1000832.中国石化西南分公司 勘探开发研究院,四川 成都 610081 |
| |
| 基金项目： | 中国石化科技部项目“新场沙溪庙组致密砂岩气藏提高采收率技术研究”(G5800-17-ZS-KJB004) |
| |
| 摘 要： | 砂体类型与分布特征的差异性造就了油气储层发育的非均质性,通过岩心垂向序列特征明确了沙溪庙组砂体成因类型,并综合测井、地震资料刻画了不同类型砂体的空间分布。沙溪庙组浅水三角洲平原发育垂积型主河道、侧积/填积型次河道砂体以及溢岸砂体,前缘发育侧积型近端水下分流河道、填积型远端水下分流河道、进积型河口坝砂体以及席状砂体;平原主河道砂体厚度多大于10 m,宽600~1 800 m,通过同位垂向切叠与侧向等高程切叠而形成毯状连片砂体,次河道砂体多位于主河道侧缘,厚度平均7.5 m,物性较差,并常被主河道切割而零星分布;内前缘近端水下分流河道砂体厚4~8 m,宽500~1 200 m,多错位切叠或拼接接触,呈带状;远端水下分流河道发育于三角洲外前缘,单砂体厚2.5~6 m,宽200~700 m,平面呈鞋带状,砂体孤立;前缘河口坝砂体分布较少,垂向上常被河道切叠;平原相带两类河道砂体的物性差异造成了储层内部的非均质性,而三角洲前缘储层的非均质性更多在于不同类型砂体的迷宫状展布上。
|
| 关 键 词： | 浅水三角洲 砂体类型 砂体展布 沙溪庙组 新场气田 |
| 收稿时间： | 2018-08-31 |
| 修稿时间： | 2019-04-15 |
Sandbody Type and Distribution Characteristics of Shallow-Water Delta in Shaximiao Formation,Xinchang Gas Field,West Sichuan |
| |
| GAO Yang,HU Xiangyang,ZENG Daqian,ZHAO Xiangyuan,JIA Ying,YU Qingyan,WANG Yongfei.Sandbody Type and Distribution Characteristics of Shallow-Water Delta in Shaximiao Formation,Xinchang Gas Field,West Sichuan[J].Geoscience——Journal of Graduate School,China University of Geosciences,2019,33(6):1163-1173. |
| |
| Authors: | GAO Yang HU Xiangyang ZENG Daqian ZHAO Xiangyuan JIA Ying YU Qingyan WANG Yongfei |
| |
| Institution: | 1. Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083,China2. Exploration and Production Research Institute, SINOPEC Southwest Company, Chengdu, Sichuan 610081,China |
| |
| Abstract: | Reservoir heterogeneity is commonly determined by sandbody type and distribution characteristics. Sandbody sedimentary processes can be reflected by vertical sequences, while its spatial distribution can be described by comprehensive logging and seismic survey. In shallow-water delta plain of the Shaximiao Formation, trunk distributary channel (vertical accretion), secondary channel (lateral accretion/aggradation) and the overbank sandbody are developed. Proximal distributary channel (lateral accretion), distal distributary channel (aggradation), estuary bar (progradation) and the sheet sand are developed in the deltaic front. Trunk channels in the delta plain are commonly thicker than 10 m and 600 to 1,800 m wide. The sandbodies can be vertically stacked and laterally stacked in an equal horizontal level, exhibiting a blanket-shaped distribution. Secondary channel sandbodies are mostly located at the lateral edge of the channel and distributed sporadically due to the cutting, with an average thickness of 7.5 m and poor physical properties. Proximal distributary channels are 4 to 8 m thick and 500 to 1,200 m wide. The sandbodies are vertically stacked (misplaced) and laterally stacked in an unequal horizontal level, exhibiting a belt-shaped distribution. Distal distributary channel is 2.5 to 6 m thick and 200 to 700 m wide, exhibiting a shoelace-shaped or isolated distribution pattern. Estuary bar is less developed and often overprinted by channels. Reservoir heterogeneity in the delta plain lies in its physical property difference of two different types of channel sandbodies, while in the deltaic front lies in the labyrinth distribution of sandbody of different origins. |
| |
| Keywords: | shallow-water delta sandbody type sandbody distribution Shaximiao Formation Xinchang gas field |
|
| 点击此处可从《现代地质》浏览原始摘要信息 |
| 点击此处可从《现代地质》下载免费的PDF全文 |
|
