西北巴拉望盆地生物礁地震剖面特征与油气检测技术

Seismic Profile Characteristics of Reefs and Hydrocarbon Detection Technology in Northwest Palawan Basin

朱从军 宋金甫 谢英刚 郭清正 张率

ZHU Congjun SONG Jinfu XIE Yinggang GUO Qingzheng ZHANG Shuai

中海油能源发展钻采工程研究院, 天津塘沽 300457; 大港油田第二采油厂, 河北黄骅 061103

Oilfield Engineering Research Institude, CNOOC Energy Technology & Services, Tanggu Tianjin 300457, China; The Second Oil Production Plant of DaGang Oilfield, Huanghua Hebei 061103, China

南海西北巴拉望盆地在古新世控凹断层上盘古地形高处发育大量的生物礁和巨厚的泥岩,形成工区重要的储盖组合类型。通过多年的勘探开发,已发现27个生物礁油气田。从南海西北巴拉望盆地的演化以及生物礁的形成入手,对盆地内已发现的生物礁油气藏的地震响应特征进行归纳总结,为有效识别生物礁油气藏打下基础。同时,利用生物礁含油气后具有高波阻抗、低频率等特征,探索出运用稀疏脉冲反演以及地震属性设置门槛值过滤的方法,检测生物礁的含油气性,以提高生物礁油气藏的勘探成功率。

In the hanging wall of faults which controlled the Paleocene depression in the Northwest Palawan Basin in the South China Sea, a large number of ancient terrain height reefs and thick mudstones are well developed, forming important reservoir cap combination type in the study area. Through years of exploration and development, 27 reef oil and gas fields have been discovered. In this article, the Northwest Palawan basin evolution and reef formation in this basin have been discussed, and the seismic response characteristics of reef oil and gas reservoir discovered in this basin are summarized, which lay a solid foundation for valid identification of reef reservoirs. Meanwhile, the reef reservoirs after containing oil and gas are characterized by high impedance and lowfrequency. The sparse spike inversion method and filtering method by setting threshold value of seismic attribute have been used to detect hydrocarbon bearing conditions of reefs to improve the reef reservoir exploration success rate.

https://doi.org/10.3969/j.issn.1008-2336.2014.03.061