04262nas a2200421 a 4500 20260818090414.0 090907s2009 th uu|m rtt 0| a1eng d .b12067192 AIT Thesis no.OTM-09-04 Prairaya Somanandana Determination of Eaton's Exponent in the Gulf of Thailand Pathum Thani, Thailand : Asian Institute of Technology, 2009 84 leaves : ill. Thesis ; no. OTM-09-04 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering Offshore Technology and Management, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 2009 Eaton's model, a pore pressure prediction equation utilizing porosity to stress relation, has one of the governed factors known as Eaton's Exponent "EE", acting as enhancing factor of overpressure zones. Via his model this factor obtained empirically and suggests that it should be estimated by region due to differences in area's characteristics, leading to the study of specific EE within the Gulf of Thailand. In Eaton's model overpressure sections buried in deep portion of thick sediments with small heterogeneity. In contrast to the study areas locate in the Gulf of Thailand within Pattani Basin to Northern portion of Malay Basin, abnormal pressure zones are in much shallower portion, in heavy faulting system, with thin sequences of sand/shale interbeded, and influenced by high heat flow. In this paper, EE determination method utilizes actual formation pressure measurements under three major controlling factors of overburden stress, shale normal compaction, and temperature. Most study wells are at normal hydrostatic condition, instead of pore pressure gradient in P/Z now use calculated fluid gradient from RFT/MDT comprises with fluid sample report. The most suitable EE is calculated from fluid gradient in hydrocarbon interval. This resulted from a difficulty in estimating pressure in shale section due to shaly ambiguity and non-linear relation of formation pressure. Furthermore, by calculating using all fluid gradients instead of only hydrocarbon zone will lessen the effect of abnormal pressure. Eaton's exponent is directly affected by temperature but inverses to overburden stress. The calculated EE is estimated according to region where EE in North region (North Pattani Basin) is 0.7, then decreasing to 0.4 in Southern regions (South Pattani Basin and Uppermost portion of North Malay Basin), and then jump to approximately 1 or above in Northwestern flank Malay Basin where well locations lie in close proximity to high heat flow zone (Central Malay Basin). In water wells, EE is approaching o. Predicted pore pressure from Eaton's equation using conventional sonic Eaton's exponent in sonic technique or "3", and using calculated EE, shows 38% and 9% deviation from actual fonnation test pressure, respectively. This evidently proves that predicted EE improves accuracy in the Gulf of Thailand region. Hydrostatics Thailand, Gulf of Hydrostatic pressure Thailand, Gulf of Thailand, Gulf of Chiu, Gregory L.F., Chairperson Jirawat Chewaroungroaj, Co-chairperson Worsak Kanok-Nukulchai, Examination Committee Widjaja, Joko Harsono, Examination Committee Pearl Oil (Thailand) Limited, Scholarship donor Asian Institute of Technology. Thesis ; no. OTM-09-04 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B03589 .b12067192 mnait u 240329 0 090907 m a u 0 mnait mnarc 22 40 Barcode : 30050120685705 CREATED : 2014-05-19 RECORD # : i12800739 LPATRON : 1026166 LCHKIN : 2018-09-26 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050160006408 CREATED : 2016-03-23 RECORD # : i12905859 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 27987 27987 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.OTM-09-04 30050120685705 2026-08-18 09:04:14 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.OTM-09-04 30050160006408 2026-08-18 09:04:14 1 2026-08-18 40