综合地震、钻井、测井、生产动态等资料,针对四川盆地安岳气田磨溪区块下寒武统龙王庙组储集层特征与展布、气水分布等影响开发效果的关键地质问题开展研究,确定开发技术对策。结果表明：①磨溪区块垂向发育4期颗粒滩体,平面呈现“两滩一沟”格局;②储集层可分为溶蚀孔洞、溶蚀孔隙和基质孔隙3种类型,有效储集层以溶蚀孔洞和溶蚀孔隙型为主;③储集层基质物性较差,受高角度构造缝影响,整体表现为低孔、中—高渗特征;④气藏由西向东,气水界面逐渐降低,呈“三段式”结构,建产区统一气水界面为-4 385 m。在气藏地质特征认识基础上,结合数值模拟结果与国内外相似气田开发经验,确定开发技术政策：以颗粒滩主体发育区作为优先建产目标区;在构造高部位集中布井,延缓边水非均匀推进速度,延长气田稳产期;部署水平井,提高单井产能;确定气井合理配产和调峰气井产量,提升气藏开发效果。图12表2参11
李熙喆
,
郭振华
,
万玉金
,
刘晓华
,
张满郎
,
谢武仁
,
苏云河
,
胡勇
,
冯建伟
,
杨炳秀
,
马石玉
,
高树生
. 安岳气田龙王庙组气藏地质特征与开发技术政策[J]. 石油勘探与开发, 2017
, 44(3)
: 398
-406
.
DOI: 10.11698/PED.2017.03.09
Seismic, drilling, logging and production performance data were analyzed to study the key geological factors such as reservoir properties and gas/water distribution, which influence the development of the Lower Cambrian Longwangmiao reservoirs in the Moxi block, Anyue gas field, Sichuan Basin, and the development strategies are established. The results indicate that: (1) Four stages of grain shoals developed longitudinally and two main shoals with one trench formed laterally in the development area; (2) Three types of reservoirs are identified, which are reservoir with millimeter sized dissolved vugs, reservoir with solution pores, and reservoir with inter-particle/inter-crystal pores; (3) Low matrix porosity but mid-to-high permeability affected by developed high-dip fractures; and (4) Three gas/water contacts (GWC) can be defined and step down from west to east, with a unique gas/water contact of -4 385 m in the target developing area. Based on geologic characterization, reservoir simulation and case study of similar gas reservoirs, the development strategies are made: to select the main grain shoal area as the prior production area; to locate wells on the structural high to delay edge water breakthrough and prolong stable production; to drill horizontal wells enhancing single well deliverability; to keep reasonable production of wells for improving the production effect.
[1] 徐春春, 沈平, 杨跃明, 等. 乐山—龙女寺古隆起震旦系—下寒武统龙王庙组天然气成藏条件与富集规律[J]. 天然气工业, 2014, 34(3): 1-7.
XU Chunchun, SHEN Ping, YANG Yueming, et al. Accumulation conditions and enrichment patterns of natural gas in the Lower Cambrian Longwangmiao Fm reservoirs of the Leshan-Longnüsi Paleohigh, Sichuan Basin[J]. Natural Gas Industry, 2014, 34(3): 1-7.
[2] 金民东, 谭秀成, 李凌, 等. 四川盆地磨溪—高石梯地区下寒武统龙王庙组颗粒滩特征及分布规律[J]. 古地理学报, 2015, 17(3): 347-357.
JIN Mindong, TAN Xiucheng, LI Ling, et al. Characteristics and distribution of grain bank of the Lower Cambrian Longwangmiao Formation in Moxi-Gaoshiti area, Sichuan Basin[J]. Journal of Paleogeography, 2015, 17(3): 347-357.
[3] 杜金虎, 邹才能, 徐春春, 等. 川中古隆起龙王庙组特大型气田战略发现与理论技术创新[J]. 石油勘探与开发, 2014, 41(3): 268-277.
DU Jinhu, ZOU Caineng, XU Chunchun, et al. Theoretical and technical innovations in strategic discovery of a giant gas field in Cambrian Longwangmiao Formation of central Sichuan paleo-uplift, Sichuan Basin[J]. Petroleum Exploration and Development, 2014, 41(3): 268-277.
[4] 魏国齐, 杨威, 谢武仁, 等. 四川盆地震旦系—寒武系大气田形成条件、成藏模式与勘探方向[J]. 天然气地球科学, 2015, 26(5): 785-795.
WEI Guoqi, YANG Wei, XIE Wuren, et a1. Formation conditions, accumulation models and exploration direction of large gas fields in Sinian-Cambrian, Sichuan Basin[J]. Natural Gas Geoscience, 2015, 26(5): 785-795.
[5] 孟宪武, 朱兰, 王海军, 等. 川西南地区下寒武统龙王庙组储层特征[J]. 成都理工大学学报(自然科学版), 2015, 42(2): 180-187.
MENG Xianwu, ZHU Lan, WANG Haijun, et al. Characteristics of Lower Cambrian Longwangmiao Formation reservoir in Southwest Sichuan, China[J]. Journal of Chengdu University of Technology (Science & Technology Edition), 2015, 42(2): 180-187.
[6] 姚根顺, 周进高, 邹伟宏, 等. 四川盆地下寒武统龙王庙组颗粒滩特征及分布规律[J]. 海相油气地质, 2013(4): 1-8.
YAO Genshun, ZHOU Jin’gao, ZOU Weihong, et al. Characteristics and distribution rule of Lower Cambrian Longwangmiao grain beach in Sichuan basin[J]．Marine Origin Petroleum Geology, 2013(4): 1-8.
[7] 周进高, 房超, 季汉成, 等. 四川盆地下寒武统龙王庙组颗粒滩发育规律[J]. 天然气工业, 2014, 34(8): 27-36.
ZHOU Jin’gao, FANG Chao, JI Hancheng, et al. A development rule of Lower Cambrian Longwangmiao grain beaches in the Sichuan Basin[J]. Natural Gas Industry, 2014, 34(8): 27-36.
[8] 魏国齐, 杨威, 杜金虎, 等. 四川盆地高石梯—磨溪古隆起构造特征及对特大型气田形成的控制作用[J]. 石油勘探与开发, 2015, 42(3): 257-265.
WEI Guoqi, YANG Wei, DU Jinhu, et al. Tectonic features of Gaoshiti-Moxi paleo-uplift and its controls on the formation of a giant gas field, Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2015, 42(3): 257-265.
[9] 周进高, 徐春春, 姚根顺, 等. 四川盆地下寒武统龙王庙组储集层形成与演化[J]. 石油勘探与开发, 2015, 42(2): 158-166.
ZHOU Jin’gao, XU Chunchun, YAO Genshun, et al. Genesis and evolution of Lower Cambrian Longwangmiao Formation reservoirs, Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2015, 42(2): 158-166.
[10] 马新华. 创新驱动助推磨溪区块龙王庙组大型含硫气藏高效开发[J]. 天然气工业, 2016, 36(2): 1-8.
MA Xinhua. Innovation-driven efficient development of the Longwangmiao Fm large-scale sulfur gas reservoir in Moxi block, Sichuan Basin[J]. Natural Gas Industry, 2016, 36(2): 1-8.
[11] 孙玉平, 韩永新, 张满郎, 等. 全球碳酸盐岩气田开发调研报告[R]. 廊坊: 中国石油勘探开发研究院廊坊分院, 2013.
SUN Yuping, HAN Yongxin, ZHANG Manlang, et al. Literature review and summary of world carbonate natural gas reservoir development[R]. Langfang: Langfang Branch, Research Institute of Petroleum Exploration and Development, 2013.
