Pak Agung, tadi saya ada japri ke pak Agung menanyakan salah satu area di Central Sumatera Basin
Sent from Suryadi's iPad On Mar 16, 2012, at 4:55 PM, "Agung Pamudji Widodo" <apwid...@patranusa.com> wrote: > Mohon maaf pak moderator, > Numpang lewat, untuk menggalang semangat baru untuk explorasi, baik di > Mature Area maupun Frontier Area, > > “Mari Optimalkan Ikhtiar untuk Explorasi Migas”. > > Ini salah satu yang sudah kami mulai. ( tiga basin C.Sumatra, S.Sumatra, > Kutei). > > Salam > Agung P. Widodo > 0811.98.3285 > > > Post-Mortem Analysis of Exploration Oil and Gas Well > in Central Sumatera Basin > Vol. 2 (2012) > > The result of an exploratory well most of the time is different with what was > expected from the prognosis. The result has never been precisely the same > with what we predicted prior to drilling. The discrepancies between the > drilling prognosis and actual drilling result can lead to the well being > considered as a dry hole well. > The objective of this comprehensive analysis is to re-evaluate selected wells > to better understand the reasons for the failure and to identify the > overlooked hydrocarbon potential. > The analysisis integrated geological, petrophysical and reservoir analyses. > Well information from prognosis, during operation and well end report were > extensively evaluated. Understanding of regional petroleum system is > critical. Therefore, all related report and published information were > compiled and interpreted to build the regional petroleum system for the > Central Sumatera Basin. Petrophysical evaluation was done in parallel to > estimate the reservoir and fluid properties. These evaluations were > integrated with other related well data to come up with a more consistent > interpretation. A model was then constructed to define the available > potential for each individual well. > Post mortem analysis for 36 oil and gas exploration wells in Central Sumatera > Basin that identified as dry or suspended were conducted, the data > availability of each well are are shown in the table below: > <image001.jpg> > > The results of analysis are as follow: > a. 18 wells of 36 wells have upside potential. Based on well basis > calculation, the Contingent Possible (C3) Oil Inplace is 16.3MMstb. > b. 1 (one) well that was drilled in September 1987. After reached TD DST > was not conducted and well P&A. Petrophysical analysis identify there is > potential hydrocarbon at 1356-1384ft, 1304-1314ft, and 1188 – 1211 ft. with > potential contingent possible gas in place is 8.49 Bcf. > c. 1 (one) well that was drilled in March 1991. After reached TD > formation sampling was conducted by wireline and recover inflammable gas at > depth 2555ft. Petrophysic analysis identify as gas formation with probably > high CO2. Contingent possible gas in place is 20.9 Bcf. Beside that upside > potential identified based on petrophysical analysis at 1982 – 2075 ft and > 2710 – 2792 ft with total well basis calculation possible contingent oil in > place is 1.4 MMSTB. > d. 1 (one) well that was drilled in January 1975 and conducted DST job at > two intervals. At first interval no oil can flow naturally, after swabbing > got water. At second interval no oil can flow naturally, after swabbing got > oil with API 30.4 and pour point 105oF. Based on well basis calculation, > obtain Proven Oil in place (P1) is 0.497 MMstb and Possible oil in place (P3) > is 0.558 MMstb. > e. 15 wells of 36 were lack of hydrocarbon potential. > > (yang tertarik hubungi lewat JAPRI) >
