ABSTRAKIdentifikasi dan karakterisasi gas serpih pada formasi Telisa, Lapangan AH,
Cekungan Sumatera Selatan dilakukan dengan analisis geokimia, geomekanika dan
interpretasi seismik. Pada aspek geokimia parameter yang diukur adalah kuantitas
material organik, tipe kerogen, dan kematangan serpih gas. Pada aspek geomekanika
yang diukur adalah parameter kegetasan, kekuatan batuan, dan sudut gesekan internal.
Atribut-atribut seismik yang digunakan antara lain ant-tracking, most negative
curvature, dan variance untuk melihat sebaran paleofractures, tren sesar dan struktur.
Data-data yang digunakan antara lain data geokimia (rock-eval pyrolisis), data sumur,
well tops, dan data seismik post-stack 3D.
Kekayaan material organik pada formasi serpih Telisa berdasarkan nilai TOC
adalah dari fair hingga good. Tipe kerogen adalah tipe kerogen II/III (mixed) hingga
III (gas prone). Berdasarkan analisis kematangan, formasi serpih Telisa sudah matang,
yaitu dari dari oil window hingga wet gas window. Pembedaan antara zona source
dengan non source dapat menggunakan metode Passey dan metode Bowman.
Penggunaan metode Bowman dengan shale line memberikan keakurasian yang lebih
tinggi didalam penentuan zona source. Metode Passey dan multiple linear regression
dapat memprediksi nilai TOC dan menentukan lingkungan pengendapan. Penggunaan
metode multiple linear regression memberikan keakurasian yang lebih tinggi ketika
dikalibrasikan data TOC laboratorium. Persamaan-persamaan empiris diformulasikan
untuk menentukan persamaan-persamaan kegetasan, kekuatan batuan, dan sudut
gesekan internal pada Formasi Serpih Telisa
ABSTRACTThe Shale Gas?s characterization of Telisa Formation, AH Field, South
Sumatera Basin was done through geochemical, geomechanical? analysis and seismic
interpretation. There are several geochemistry?s parameters were analyzed and
measured in this research such as the quantity, kerogen?s type, and thermal maturity of
the shale. There are several geomechanical parameters that were studied, such as
brittleness, rock strength, and internal friction angle. The multi-attribute analysis was
conducted to see the sweet spots. Ant-tracking, most negative curvature, and variance
are powerful attributes to see the distribution of paleofractures, faults and structural
trends. There are several data were used such as geochemical data (rock-eval pyrolisis),
well logs, well tops, and post-stack 3D seismic data.
The richness of organic matter was analyzed by the value of TOC which went
to the category of ?fair? until ?good?. The kerogen type is tpe II/III (mixed) (oil/gas
prone) until III (gas prone). The Telisa shale?s maturity already went to the ?mature?
stage, which was oil window until wet gas window. The techniques that could be used
to differentiate the source from the non source were Passey?s and Bowman?s method.
The use of Bowman?s method gives high confidence for doing this task by using the
?shale line?. Passey?s and multiple linear regression?s method could be utilized to
predict the TOC valuesa and depositional environment. Multiple linear regression?s
method gives higher accuracy when calibrated with shale?s geochemical data. The
empirical relations were formulated to predict the equations of brittleness, rock
strength, and internal friction angle in Telisa Formation
T46544-Aldo Hutagalung.pdf :: Unduh