琼东南盆地中央峡谷“深海一号”大气田周缘成藏条件与滚动勘探成效

陈奎; 王雯娟; 徐万兴; 姜占东; 舒克栋; 黄安敏

doi:10.11781/sysydz202305994

琼东南盆地中央峡谷“深海一号”大气田周缘成藏条件与滚动勘探成效

doi: 10.11781/sysydz202305994

1.
中海石油(中国)有限公司湛江分公司, 广东湛江 524057
2.
中海石油(中国)有限公司海南分公司, 海口 570300

基金项目:

中国海洋石油有限公司科技项目“南海深水盆地油气运聚成藏分析与突破方向” KJGG2022-0103

详细信息

作者简介:
陈奎(1986-), 男, 硕士, 高级工程师, 本刊青年编委, 从事油气勘探研究。E-mail: chenkui3@cnooc.com.cn

中图分类号: TE122.3
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- 文章访问数: 163
- HTML全文浏览量: 64
- PDF下载量: 37
- 被引次数: 0
出版历程
- 收稿日期: 2023-02-19
- 修回日期: 2023-08-02
- 刊出日期: 2023-09-28

Accumulation conditions and rolling exploration results in the periphery of "Deep Sea No. 1" giant gas field in central canyon of Qiongdongnan Basin

1.
Zhanjiang Branch of CNOOC China Limited, Zhanjiang, Guangdong 524057, China
2.
Hainan Branch of CNOOC China Limited, Haikou, Hainan 570300, China

摘要

摘要: 为探明琼东南盆地中央峡谷“深海一号”大气田的地质储量，推动该大气田的可持续开发，创新性地将滚动勘探技术引入中央峡谷深水天然气勘探。搜索该区5个潜力区块开展了滚动勘探，优选成藏条件优越且能够动用控制地质储量层位的块4，针对莺歌海组T₂₉B、T₂₉E砂体以及黄流组HL-Ⅰ_上、HL-Ⅲ、HL-Ⅳ气组开展了成藏条件研究；并通过与周边已钻井成果及成藏规律的类比，重点研究了块4的圈闭、储层沉积、油气运聚等成藏条件。块4黄流组和莺歌海组T₂₉E砂体均为被中央峡谷水道壁与峡谷内部后期弱振幅泥质水道联合封闭形成的岩性圈闭，而莺歌海组T₂₉B砂体为峡谷背景下的海底扇局部高点形成的背斜圈闭；通过振幅属性砂体刻画技术、正演模拟技术，落实了块4黄流组和莺歌海组目的层中好的储盖组合；油气通过底辟、高角度裂缝和微裂缝等垂向运移通道运移至目的层圈闭中，而圈闭的顶底板有效性较好，从而起到很好的保存油气的作用。根据各成藏要素落实了资源量参数及潜在资源量，开展深水滚动探井部署，引入深水定向井钻探技术，部署L17-10d井落实含气层系和储量规模，取得了较好的钻探效果。L17-10d井在T₂₉B、T₂₉E砂体及HL-Ⅲ气组钻遇纯气层，气层垂厚近45 m，落实探明地质储量近70亿立方米；证实了中央峡谷深水区的成藏规律，为周边区域滚动勘探指明了方向；同时促进了部分难动用天然气探明地质储量与控制地质储量的动用，为深海一号大气田后续可持续开发提供了有力保障。
- 滚动勘探 /
- 成藏研究 /
- 深海一号大气田 /
- 中央峡谷区 /
- 琼东南盆地
Abstract: In order to explore high-quality proven geological reserves for the "Deep Sea No.1" giant gas field in the central canyon of the Qiongdongnan Basin and promote the sustainable development of the giant gas field, the rolling exploration technology is innovatively introduced into the deep-water natural gas exploration in the central canyon. The main gas-bearing strata such as the Upper Miocene Huangliu Formation and the Pliocene Yinggehai Formation on the periphery of mature exploration area of the gas field are studied. Five potential blocks are searched for rolling exploration, and Block 4 with superior reservoir forming conditions and the ability to control geological reserves is selected. The reservoir forming conditions of T₂₉B and T₂₉E sand bodies in the Yinggehai Formation, upper HL-Ⅰ, HL-Ⅲ and HL-Ⅳ gas groups in the Huangliu Formation are studied. By analogy with drilling data and accumulation rules of the surrounding wells, the accumulation conditions such as trap, reservoir deposition and oil and gas migration and accumulation of Block 4 are studied. The T₂₉E sand bodies of the Huangliu Formation and the Yinggehai Formation in Block 4 are all lithologic traps formed by the joint closure of the central canyon channel bank and the weak-amplitude muddy channel in the later stage of the canyon. The T₂₉B sand body is an anticline trap formed by the local high point of the submarine fan under the canyon background. Through the amplitude attribute sand body characterization and forward modeling, the reservoir-seal combination of the target layer of the Huangliu and Yinggehai formations in Block 4 is well implemented. The vertical migration modes such as diapirs, high-angle fractures and micro-fractures are migrated to the target layer traps, and the effectiveness of the top and bottom plates of the traps is good, thus playing a good role in preserving oil and gas. According to the accumulation factors, the resource parameters and potential resources are implemented, and the deployment of deep-water rolling exploration wells is carried out. The deep-water directional drilling technology is innovatively introduced, and the well L17-10d is deployed to implement the gas-bearing strata and reserve scale as much as possible, and good drilling results are achieved. The well L17-10d encountered a pure gas layer in the T₂₉B, T₂₉E sand bodies and the HL-Ⅲ gas group. The vertical thickness of the gas layer was nearly 45 m, and the proven geological reserves were nearly 7 billion cubic meters. It further confirmed the accumulation law of the deep water area of the central canyon, pointed out the direction for the rolling exploration of the surrounding area, promoted the production of proven geological reserves and controlled geological reserves of some difficult-to-produce natural gas, and provided a strong guarantee for the subsequent sustainable development of the "Deep Sea No.1" giant gas field.
- rolling exploration /
- accumulation research /
- "Deep Sea No. 1" giant gas field /
- central canyon area /
- Qiongdongnan Basin
注释:

1) 利益冲突声明/Conflict of Interests

1) 所有作者声明不存在利益冲突。

2) 作者贡献/Authors’Contributions

2) 陈奎、王雯娟参与研究方法和技术手段讨论、设计；陈奎、徐万兴、姜占东、舒克栋参与研究方法和技术手段的实践应用；陈奎、王雯娟、徐万兴、姜占东、舒克栋、黄安敏参与论文写作和修改。所有作者均阅读并同意最终稿件的提交。

HTML全文

图 1 琼东南盆地区域构造及深水气田分布

Figure 1. Regional tectonics and deep water gas field distribution of Qiongdongnan Basin

下载: 全尺寸图片幻灯片

图 2 琼东南盆地深水一号大气田L17-3井区油藏模式

Figure 2. Reservoir pattern of L17-3 well area in "Deep Sea No. 1" giant gas field of Qiongdongnan Basin

下载: 全尺寸图片幻灯片

图 3 琼东南盆地深海一号大气田块4 L17-10d井区泥质水道发育模式

Figure 3. Development pattern of muddy channel in L17-10d well area of Block 4 in "Deep Sea No. 1" giant gas field of Qiongdongnan Basin

下载: 全尺寸图片幻灯片

图 4 琼东南盆地中央峡谷区连井沉积相图

Figure 4. Sedimentary facies of wells in central canyon area of Qiongdongnan Basin

下载: 全尺寸图片幻灯片

图 5 琼东南盆地深海一号大气田块4莺歌海组T₂₉E砂体正演模拟

Figure 5. Forward modeling for T₂₉E sand body in Yinggehai Formation in Block 4 in "Deep Sea No. 1" giant gas field of Qiongdongnan Basin

下载: 全尺寸图片幻灯片

图 6 琼东南盆地中央峡谷区油气运移模式

Figure 6. Oil and gas migration pattern of central canyon area of Qiongdongnan Basin

下载: 全尺寸图片幻灯片

图 7 琼东南盆地中央峡谷区气柱高度统计

Figure 7. Statistics of gas column height in central canyon area of Qiongdongnan Basin

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图 8 琼东南盆地深海一号大气田块4滚动勘探井位部署

Figure 8. Deployment of rolling exploration wells in Block 4 in "Deep Sea No. 1" giant gas field of Qiongdongnan Basin

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图 9 琼东南盆地深海一号大气田块4 L17-10d井钻后油藏模式

Figure 9. Reservoir pattern of Block 4 after drilling of well L17-10d in "Deep Sea No. 1" giant gas field of Qiongdongnan Basin

下载: 全尺寸图片幻灯片

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