Abah, Sepanjang pengetahuan saya shale gas tidak selalu methan, tergantung sejarah maturity dan type karogen dari sourcenya Pak.
Yang membedakan kondisi arid/semi arid region adalah terbentuknya mineral high saline/evaporite evironment seperti dolomite anhydrite kemungkinan juga silika bercampur dan interkalasi dengan organic rich shale. Sehingga source rock bersifat brittle, mudah dilakukan fract secara efektif. Kondisi lingkungan tsb sangat bervariasi, memungkinkan terjadinya local depo-pod yang sangat kaya mengandungi TOC sampai 3-4%, sehingga ada area dan layer atau “sweet spot” yang ideal memenuhi Kriteria sebagai Shale Gas. Berbeda dengan sistem lacustrine dan tropical, kondisinya selalu penuh air dan hyposline clay particles dan organic mattersnya (algae/plankton) terkubur bersamaan “hampir” merata di semua bagian danau, sehingga jarang ditemukan “sweet spot”. Kalau TOCnya 1-2% dan yang sisanya adalah clay dan silt particle pertanyaannya adalah apakah brittlenessnya bisa meet criteria untuk dilakukan fracturing secara efektif ?? Saya kira itu yang sedang didiskusikan oleh Pak Naslin, Pak Anggoro dkk, yang penting kriteria TOC cut off atau brittleness dari shale tersebut. Mungkin bapak-bapak bisa menambahkan.. Salam Ruskamto 1061 From: Yanto R. Sumantri [mailto:yrs_...@yahoo.com] Sent: 25 Juni 2012 9:52 To: iagi-net@iagi.or.id Subject: Re: [iagi-net-l] Shale gas news Pak Rus Secara fisik dan mineralogi apakah perbedaan anatar deep sea shale dengan hale yang dosebutkan yg doiendapkan pada semi arid /sabhka/ restricted env ? Apa pengaruhnya untuk kandungan gas methane ? si Abah _____ From: Ruskamto <rsoeri...@yahoo.com> To: iagi-net@iagi.or.id Sent: Monday, June 25, 2012 7:19 AM Subject: Re: [iagi-net-l] Shale gas news Saya pernah sedikit sharing dimaillist, bahwa umumnya bahwa shale gas yang sukses di US adalah mid Paleozoic intracratonic semi-arid, restrictric marine hingga sabkha. Sweetspot organic rich shale bercampur authigenic/evaporite mineral spt dolomite, anhydrite dll (CMIIW). Kondisi dep env. yang mendukung brittleness dan fractability dari shale gas tsb. Sukses story untuk Mezosoic(Jurassic Pre-Rift) juga belum terdengar.. Sekedar meramaikan diskusi Pak. RUS 1061 _____ From: Anggoro Dradjat <adradjat....@gmail.com> Date: Sun, 24 Jun 2012 19:29:53 +0700 To: <iagi-net@iagi.or.id> ReplyTo: <iagi-net@iagi.or.id> Subject: Re: [iagi-net-l] Shale gas news Nama cekungan yang di Polandia itu apa yaa? shale di formasi apa? kalau ngak salah yang di Amerika itu kebanyakan berada di Intra Craton Basin dan dari lingkungan pengedapan Lacustrin, Kalau yang di Amerika seperti yang dipresentasikan Pak Naslin di UGM, horizontal layeringnya terlihat jelas adanya Vertikal Transfer Isotropic yang menggambarkan perbedaan cepat rambat gelombang P secara vertikal, perubahan TOC dari shale juga tercermin dari sonic resistivity DlogR. Wah kalau abu-abu isotropic dong, sedikit organiknya dan ngak fracable. Mungkin lokasinya dipilih dari sweet spot seismic? Tapi seharusnya kan dilihat dahulu dari data sumur yang ada? apakah sweet spot itu mengambarkan zona resistivitas yang tinggi dan zona anisotropi dari shale. Kemungkinan yang lain adalah belum ada data sumur, jadi explorasi banget buat shale? Atau operatornya dari negara dengan kekuatan militer terbesar di dunia tapi ngak pernah menang perang...heee...heeee Salam Anggoro Dradjat On Sun, Jun 24, 2012 at 6:04 PM, nyoto - ke-el <ssoena...@gmail.com> wrote: Apakah itu berarti operatornya tertipu atau ditipu atau salah interpretasi sebelumnya sehingga mengexecute project tsb ? Rasa2nya operator sebesar EM itu dg jumlah PhD nya yg sampai 600 (email cak Avi), tidak mungkin deh. Atau ada info2 lain ? Wass, nyoto On Sun, Jun 24, 2012 at 3:49 PM, naslin lainda <nas...@rediffmail.com> wrote: Tadi saya barusan ngobrol ama teman yg terlibat di eksplorasi shale gas di polandia ini. Katanya TOC nya rendah dibawah 1%. Dari foto core nya warnanya abu2, bukan seperti black shale yg di US. Jadi kayaknya bukan organic rich shale yg mereka dapatkan. Naslin From: "rakhmadi avianto"rakhmadi.avia...@gmail.com Sent:Wed, 20 Jun 2012 12:17:44 +0530 To: iagi-net@iagi.or.id Subject: Re: [iagi-net-l] Shale gas news Dari awal aku memang sudah curiga, mungkin ngga ya Shale Gas Exploration, dg exitnya EM dari Poland saya kira bukan hal yg main2. Saya yg alumnus EM merasa bahwa EM tidak pernah main2 dalam research di Houston setahu saya waktu di sana ada 600an lebih PHD yg kerja di Lab yg diambil dari lulusan hampir seluruh dunia dg GPA yg mendekati 4 yg diterima artinya lulusan Top of the nudge lah > >Untuk Indonesia, mungkin tidak semua shale punya potential jadi Shale Gas, ini >yg belum di evaluasi, belum apa2 koq ujuk2 udah sekian TCF emang dari mana dan >dasarnya apa? > >Ingat RDP waktu jadi panelis di gas hydrate, acara Pertamina di Kempinski >Hotel, RDP mengusulkan harus ada Pilot Project dari Zero ke Hero, artinya >research yg ter-integrasi, ada G&G, ada drilling, dll krn menyangkut >fracturing dimana ada usaha dari shale yg nature-nya impermeable menjadi >permeable, tentu tidak mudah dan tentu perlu dedikasi yg tinggi dalam research >ini. > >Salam, >Avi NPA 06666 >Nomor cantik > > On Tue, Jun 19, 2012 at 4:38 PM, Fatrial Bahesti <bahe...@gmail.com <http://ajaxprism/writemail?mode=mail_to_individual&email=bahe...@gmail.com> > wrote: > Mudah2an shale exit tidak terjadi di Indonesia, melainkan tetap exist for shale gas exploration.. > ExxonMobil in Poland shale exit By Kathrine Schmidt and news wires 18 June 2012 18:00 GMT Following two disappointing test wells in January, ExxonMobil has made the decision to call off further exploration there, a spokesman said Monday. "There have been no demonstrated sustained commercial hydrocarbon flow rates in our two wells in the Lublin and Podlasie basins," ExxonMobil spokesman Patrick McGinn told Upstream in an email. "We do not have additional drilling plans in Poland." The supermajor's chief executive Rex Tillerson in March alluded to some of the technical challenges of drilling in rock formations that had initially held high hopes for unconventional production. The US Energy Information Administration has pegged Poland as having among the largest shale reserves in Europe. Nonetheless, ExxonMobil chief executive Rex Tillerson spoke to the technical difficulties there in a New York meeting with analysts in March. “Some of the shales don’t respond as well to hydraulic fracturing,” the news wire quoted Tillerson as saying during a meeting with reporters after his presentation to analysts. “It’s going to take research and time in the lab to understand that.” Reuters said that a government report in March slashed estimates of Poland's shale gas reserves to 346 billion to 768 billion cubic meters, or about one-tenth of previous estimates, denting hopes for an energy source that could play a key role in weaning Europe off Russian gas. Poland has granted 112 shale exploration licences to ExxonMobil, Chevron and other firms, even as some countries, including France and Bulgaria, have banned shale exploration pending further environmental studies. The Poles are keen to wean themselves off their heavy reliance on coal and imported Russian gas, partly due to environmental commitments they face as a European Union member nation. "ExxonMobil realised that commercial extraction was not possible with currently available technology. This is a general problem in Poland that shale rocks are too tight to allow extraction," an industry source told the news wire, asking not to be identified. Abundant shale gas production in Poland poses a potential threat to Russia's supremacy in Europe, where it supplies a quarter of the gas used in the EU. Yet Russian gas export monopoly Gazprom has repeatedly played down the threat and on Monday Sergei Komlev, head of contract structuring and price formation at Gazprom Export, told a conference in London that Polish gas would struggle to achieve the low prices of US shale rivals. "In Poland the price for shale gas will be above $15 per million British thermal units, over three times than in the US where prices will rise to $5-10 (from a current $2.50) once they export gas," Komlev said. Last Wednesday, the government abruptly called off a presentation of a legal framework for the development of shale gas resources, disappointing industry players eager for more clarity before committing further to investing in the sector. "If this draft was published and ExxonMobil later declared it was leaving the country, it would most likely have been a disaster in terms of the country's image," said Piotr Spaczynski, partner at law firm Spaczynski, Szczepaniak & Wspolnicy, which advises foreign oil companies investing in Polish shale. The government now plans to unveil the draft law by the end of the month, and has said it will cover exploration and extraction of oil and gas from both conventional and unconventional sources, including taxation, licensing and environmental issues. "If I were the government, I would scrap all drafts and let companies work, or publish a draft supporting exploration and not one directed at excessive taxation," Spaczynski said. Poland had high hopes for shale after a study by the US Energy Information Association in 2011 estimated Polish reserves at 5.3 trillion cubic metres, enough to cover domestic demand for some 300 years. The government's study in March slashed estimates for recoverable shale gas reserves at 346 to 768 billion cubic metres. Despite ExxonMobil, the world's most valuable energy company, to deciding to scrap exploration, other firms said they remained committed. 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