地震—地质方法识别生物礁

Identification of reefs by seismic-geologic interpretation approach

生物礁的油气勘探工程涉及到多个学科,其中地震—地质解释是该项工程的先导和基础。地震—地质解释工作的质量将直接影响礁的地质评价及礁油藏勘探的成功率。准确识别生物礁需要认识造礁生物的生长特点、了解研究区的地质演化背景、明确生物礁的地震反射特点与另外几种地质体反射特征的区别,要特别注意应用磁力及重力资料开展综合分析;在已有钻井地区,可进一步依据测井资料及岩心薄片分析资料,可更准确地识别出生物礁。

Oil/gas exploration engineering of reefs is related to multidiscipline, among which the seismic-geologic interpretation is precursor and basis of the engineering. The quality of seismic-geologic interpretation will directly affect the geologic evaluation of reefs and successful rate of reef reservoir exploration. Accurate identification of reefs requires us to know the growing feature of reef-building organism and geologic evolution rule in studied zone, clarify seismic reflection feature of reefs and differential reflection feature from other geologic bodies, and especially it should be noted that application of magnetic and gravity data to develop comprehensive analysis; it can further rely on logging data and core slices to analyze the data in the areas of drilled wells, which can more accurately identify the reefs.