RELATIONSHIP BETWEEN FRACTURE DISTRIBUTION AND CARBONATE FACIES IN THE RAJAMANDALA LIMESTONE OF WEST JAVA REGION

摘要

Fractures can act as a major control on porosity distribution in carbonate reservoirs. Fractures in limestone can be found in a wide range of scales, from millimeters to tens of meter long. In general, two different types of open fractures can be found; extensional fractures and stylolites. Both types can be equally important in controlling porosity and permeability distribution. One of the major problems in reservoir simulation of carbonate rocks is to determine the relationship between fracture distribution and facies. Detailed outcrop study of the Oligo-Miocene Rajamandala Formation has been carried out to characterize fracture type, distribution and density. The field observations were made using the one dimensional scan-line method and the data was analyzed utilizing standard statistical methods.