Overpressure Petroleum System Analysis Northern Area Field ‘’X’’ East Kalimantan

Abstract

Analysis method of overpressure was known in dilling operation to obtain drilling strategy information. Mahakam Deltaic as main giant gas producer in Indonesia specially located on northern area was studied to gain information about pressure profile area. Analysis Normal Compaction, Overburden Gradient using Eaton and Bower’s method from wireline data is used to define pressure profile. Correlation with drilling event hopefully could established the prediction of pressure profile while drilling without supporting from wireline data.  Three pressurre profile area  has been detected by combination log data and drilling event which are top lower pressure signature by high gas, transition zone signature by occured gas cut mud due to high gas and hard ovepressure signature by issued well control.