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Applied micro fracture characterization on silokek granitic basement for NFR modeling
Koesmawardani W.T., Sapiie B., Rudyawan A.
a
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2020 IJSTR.Naturally fractured reservoir (NFR) especially in granitic basement in Sumatra is not a new issue for research. Generally in NFR modeling, fracture density of rocks in a damage zone is the most significant factor that influence fracture porosity and fracture permeability. The aim of the study is to determining micro fracture in the granitic rocks and proofing that quartz and k-feldspar minerals has significant influence for fracture density. Area of the study at Muaro Silokek, South Sumatra revealed a very heterogeneous granitic rocks outcrop and have high fracture density. At previous study conclude those area is representative as an analog NFR, especially granitic basement reservoir in Sumatra. The main fault which affect fracture orientation was right lateral strike slip faults with NW – SE orientation represented as riedel shears which is Takung Fault trend. The study was conducted using 12 data of thin section granitic oriented sample for micro fracture analysis. The result of the study shows there are three types of granitic rocks namely syeno granite, alkali feldspar granite, and monzo granite. Micro fracture characterization shows NE – SW, NNW – SSE, ENE – WSW fracture orientation. Type of micro fracture dominantly of transgranular micro fracture which means it has high fracture connectivity and paralel to high permeability. Fault zone classification shows that damage zone is at 6.5 m around faults. This fracture characterization on samples in the damage zone shows each type of granite has a different response to the micro fracture density, so it have significant implication for NFR.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Damage zone,Distance to fault,Granitic,Micro fracture,NFR,Transgranular[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]