Ferdi, Yang dibaca oleh tool "neutron" kan jumlah kerapatan / konsentrasi H+. Dalam gas (misalnya metana) memang buanyak H+ nya, tetapi masih juauhhhh lebih banyak di air dan di minyak, makanya di zona gas, pembacaan neutron akan bergeser kekanan, alias mengecil. Ini artian relatif lho....relatif "dong" dan relatif "kurang dong".... he he he ...
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 13, 2005 4:14 PM To: [email protected] Subject: [iagi-net-l] kalau gas kenapa ke kanan ya...? Kalau formasi terisi gas kenapa neutronnya malah mengecil ya alias bergeser ke kanan bergeser ke kanan...? padahal gas kan juga banyak mengandung gugus hidrogen mis : ch4 Regards Kartiko-Samodro Telp : 3852 ------------------------------------------------------------------------ ------------------------------------------------------------------------ ----------------------- Arief Budiman Mon, 12 Dec 2005 17:49:17 -0800 Prinsip utama yg harus difahami : - Neutron logging tool mengukur jumlah gugus hidrogen (hidrogen dalam - Density tool mengukur jumlah elektron NPHI besar karena : bentuk/ikatan kimia apapun, termasuk hidroksil) - coal memiliki gugus hidrogen banyak dari CH4 - gugus hidrogen juga berasal dari fracture/cleat (banyak terbentuk di coal) yg terisi air (H2O) Rhob kecil karena : - Rhob sebanding dg Rhoe Untuk single element : Rhoe = Rhob (2*NA/BA) Untuk molekul : Rhoe = Rhob (2*sum NA/BM) Coba aja hitung Rhob nya dg memasukkan BA & NA nya coal Rhob = bulk density Rhoe = elektron density NA = Nomor atom BA = Berat atom BM = Berat molekul Umumnya (2*NA/BA) dan (2*sum NA/BM) mendekati nilai 1.0 Jadi Rhoe mendekati Rhob Selamat mengulik ARIEF BUDIMAN Pertamina - Eksplorasi Sumatra Phone : (021) 350 2150 ext.1782 Mobile : 0813 1770 4257 / (021) 70 23 73 63 Home : (021) 809 2618 This e-mail (including any attached documents) is intended only for the recipient(s) named above. It may contain confidential or legally privileged information and should not be copied or disclosed to, or otherwise used by, any other person. If you are not a named recipient, please contact the sender and delete the e-mail from your system. --------------------------------------------------------------------- To unsubscribe, send email to: iagi-net-unsubscribe[at]iagi.or.id To subscribe, send email to: iagi-net-subscribe[at]iagi.or.id Visit IAGI Website: http://iagi.or.id IAGI-net Archive 1: http://www.mail-archive.com/iagi-net%40iagi.or.id/ IAGI-net Archive 2: http://groups.yahoo.com/group/iagi Komisi Sedimentologi (FOSI) : Ratna Asharina (Ratna.Asharina[at]santos.com)-http://fosi.iagi.or.id Komisi SDM/Pendidikan : Edy Sunardi(sunardi[at]melsa.net.id) Komisi Karst : Hanang Samodra(hanang[at]grdc.dpe.go.id) Komisi Sertifikasi : M. Suryowibowo(soeryo[at]bp.com) Komisi OTODA : Ridwan Djamaluddin(ridwan[at]bppt.go.id atau [EMAIL PROTECTED]), Arif Zardi Dahlius(zardi[at]bdg.centrin.net.id) Komisi Database Geologi : Aria A. Mulhadiono(anugraha[at]centrin.net.id) --------------------------------------------------------------------- ---------------------------------------------------------------------- This e-mail, including any attached files, may contain confidential and privileged information for the sole use of the intended recipient. Any review, use, distribution, or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive information for the intended recipient), please contact the sender by reply e-mail and delete all copies of this message. --------------------------------------------------------------------- To unsubscribe, send email to: iagi-net-unsubscribe[at]iagi.or.id To subscribe, send email to: iagi-net-subscribe[at]iagi.or.id Visit IAGI Website: http://iagi.or.id IAGI-net Archive 1: http://www.mail-archive.com/iagi-net%40iagi.or.id/ IAGI-net Archive 2: http://groups.yahoo.com/group/iagi Komisi Sedimentologi (FOSI) : Ratna Asharina (Ratna.Asharina[at]santos.com)-http://fosi.iagi.or.id Komisi SDM/Pendidikan : Edy Sunardi(sunardi[at]melsa.net.id) Komisi Karst : Hanang Samodra(hanang[at]grdc.dpe.go.id) Komisi Sertifikasi : M. Suryowibowo(soeryo[at]bp.com) Komisi OTODA : Ridwan Djamaluddin(ridwan[at]bppt.go.id atau [EMAIL PROTECTED]), Arif Zardi Dahlius(zardi[at]bdg.centrin.net.id) Komisi Database Geologi : Aria A. Mulhadiono(anugraha[at]centrin.net.id) ---------------------------------------------------------------------
