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From the Gobi Desert to Genghis Khan: Exploring for Heavy Oil in Mongolia

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From the Gobi Desert to Genghis Khan: Exploring for Heavy Oil in Mongolia Genghis Khan Statue Tuul river area 54 km east of UB 40 m tall, on top of 10 m visitor centre erected 2008 From the Gobi Desert to Genghis Khan: Exploring for Heavy Oil in Mongolia Jürgen Kraus Franconia Geoscience Ltd. Franconia • Geography & History • Oil & Gas in Mongolia • The Big Picture: Geological Seng of Mongolia • The East Gobi Basin • The Nyalga Basin Franconia Geography & History Between Russia and China Area: 1.6 MM km2 (19th largest country) Populaon: 3 MM 45% in Ulaanbaatar Russia “The Red Hero” Centre of the World Travel via Beijing China Area ruled by nomadic tribes Mongol Empire established 1206: largest in the world history (33 MM km2) hOps://en.wikipedia.org/wiki/Mongolia Franconia Transmongolian Railway Isolated unYl 1990s Under Soviet control in 1924 Collapse of Soviet Union in 1989… MulY-party system and market economy since 1990 New consYtuYon in 1992 Franconia Movie Trailer Genghis Khan “Universal Leader” (1162 − 1227) John Wayne (1907 − 1979) Chinggis Khan Чингис хаан Upper Onon river, Ascending the throne near Genghis Khan’s birthplace! in 1206 Franconia The benefit of sYrrups: shooYng backwards Death of G. Khan (27th Aug. 1227) Military divided into groups of 10 Burial place unknown! Tuul River, near Ulaanbaatar: 40 m tall Kherulen River in Nyalga PSC block Franconia From Genghis Khan to Kublai Khan: Franconia The Mongol Empire 1206 − 1294 (33 MM km2: largest empire ever) Divided into 4 empires in 1294 hOps://en.wikipedia.org/wiki/ File:Mongol_Empire_map.gif Franconia • Geography & History • Oil & Gas in Mongolia • The Big Picture: Geological Seng of Mongolia • The East Gobi Basin • The Nyalga Basin Nyalga Block XVI Franconia 30 PSC Blocks: 531,000 km2 • First geological study in 1892 • Zuunbayan oil field found by Soviets in 1940s (E. Gobi basin): 4 MM tons of crude oil produced • First PSC in 1993 (SOCO) • First SOCO producYon from Block XIX in 1998…no refinery in Mongolia • Since 1998 10.6 MMBL produced...10 MMBL exported to China • Mongolia 2010: 272 MM tons of “proved” reserves [Blocks XIX and ‘97] AcQve PSC Blocks (2015) Franconia Source: PetroMatad • Petroleum Authority of Mongolia established in 1990 as state-owned petroleum agency • 2 producing basins: Tamsag (since 1998) & East Gobi (1953-1969; resumed in 2007) • PSC holders: Mongolian, Chinese, and other foreign companies in approx. equal parts • Total Mongolian producYon in 2011: >260 MMBL • Other: Mongolia hosts 10% of the world’s coal reserves Franconia • Geography & History • Oil & Gas in Mongolia • The Big Picture: Geological SeUng of Mongolia • The East Gobi Basin • The Nyalga Basin Inverted lacustrine strike slip basins Compressional basins of western China: Nyalga basin of eastern Mongolia: Franconia northward collision of Indian plate (Eocene) failed rifts draped around the Hangay dome/Siberian craton Fig. 1. Major oil and gas basins of eastern Mongolia and China. Kraus and Lau (2011) M.-O. Oceanic Suture CMBR: China-Mongolia Franconia Nyalga Block XVI Border Region Mongolian island arc collage (MC) amalgamated by end of Permian! N-China block (NCB) docked Hangay-Hentey dome onto MC at 294 to 234 Ma Terminal collision of MC/ NCB with Siberian conYnent Field work at MO suture Early-Middle area Jurassic; northward subducon Three structural panels: Lithospheric extension by • Pre-Permian: independent intraoceanic developments slab breakoff/rollback in the • Post-Permian broadly Late Jurassic: intracon- shared tectono- nental riing, develop- stragraphic, petroleum- related, intraconnental ment of lacustrine basins developments Meng et al. (2003) Plate readjustment: Renewed compression K2 − TerYary Franconia Formaons of interest: Uppermost Jurassic (fluvial) through Cretaceous (lacustrine) Onset of ri~ing: basins floored by alkaline volcanics Franconia • Geography & History • Oil & Gas in Mongolia • The Big Picture: Geological Seng of Mongolia Assumed analog of Nyalga basin: • similar Post-Permian structural and • The East Gobi Basin sedimentary development • similar petroleum system(s) • beer exposed • The Nyalga Basin • beer explored • producing Franconia Producon in middle corridor: Hailar Tamsag and East Gobi! Tamsag Oil Nyalga Block XVI Producon 16,839 sq. km Unegt/Zuunbayan subbasins Hohhot Refinery Graham et al. (2001) Zuunbayan Oil Producon Complex tectonic history of transtension and transpression, mostly with a Franconia sinistral strike-slip component Field Trip 18 The East Gobi basin consists of several large subbasins formed during Jurassic – Cretaceous ri~ing. Surface and subsurface mapping in the Webb et al. (1999) East Gobi basin suggests that the region has been subjected to at least five tectonic episodes: Franconia Evolution of Zuunbayan sub-basin 3. Inversion: early K2 3. Peak riXing: mid to late K1 2. Early riing: J3-K1 1. RiX iniQaQon: Late Jurassic Johnson (2004) Franconia Prost (2004) K2 Secondary Reservoir K1 J3-K1 Primary Reservoir 450 km drive from UB to Franconia Northern Gobi desert (Sainshand): 8h Short Video No four-lane highway in Mongolia (2010) Franconia 30 Sec. Video: Choir Soviet Airbase Choir: end of paved road Franconia Franconia Sainshand (K2 type locaon) Northern Gobi Desert Franconia Franconia Breakfast Video 1 Min. Video Zuunbayan (type locaon Franconia K1) 24 Sec. Video Zuunbayan oil field (1953-1969; resumed in 2007) Franconia K2 seal th 4 member J3-K1 Tsagaantsav fm.: primary peservoir Franconia Looking East! K2 seal K1 reservoir + source +seal J3-K1 reservoir Early syn-ri~! 1.5 Min Video! J3-K1 Tsagaantsav fm. on graben shoulder: primary reservoir Franconia Looking west! J3-K1 reservoir K1 reservoir + source + seal K2 seal Zuunbayan AnYcline Franconia J3-K1 Tsagaantsav fm. coarse-grained sandstones (primary reservoir): Franconia 13-18% porosity (producing), 2 - 474 mD permeability (CNPC, 1995) Fine upward from alluvial fan to braided stream to probable floodplain and lacustrine facies [record subsidence] Early syn-ri~! K1dz1 Zuunbayan fm. white paper shales (K1dz1 secondary reservoir?) Franconia Peak ri~! Bituminous K1dz1 Lower Zuunbayan fm (reservoir, source, seal) Franconia “A possible secondary reservoir exists in channel sands of the K1 Zuunbayan Formaon. Calculated porosiYes range from 5 to 18% and permeabiliYes from 0.25 to 16 md.” (Prost, 2004) Peak ri~! K2dz2 Mid to Upper Zuunbayan fm. bituminous sandstone & gravel Franconia The most likely source rocks are Hauterivian to Albian lacustrine shales in the bituminous member of the K1 Zuunbayan Formaon. The Zuunbayan Formaon should be mature over large parts of the Unegt and Zuunbayan subbasins and has probably generated oil and some gas. (Prost, 2004) Post ri~! K1dz2 Upper Zuunbayan fm. conglomerate with interbedded sandstone (reservoir) Franconia estheria middendorfii (phyllopod) lucoptera middendorfii Post ri~! 1 Min. Video Franconia • Geography & History • Oil & Gas in Mongolia • The Big Picture: Geological Seng of Mongolia • The East Gobi Basin • The Nyalga Basin Franconia Nyalga basin in northern corridor! Tamsag Oil Nyalga Block XVI Producon 16,839 sq. km Unegt/Zuunbayan subbasins Hohhot Refinery Graham et al. (2001) Zuunbayan Oil Producon Franconia Nyalga Basin – SRTM (ShuOle Radar Topographic Mission) hOp://www2.jpl.nasa.gov/srtm/ Franconia Nyalga Block XVI • Area 16,839 km2 • Subbasins up to 7000 m deep • Proven source (K1dz1: ≤ 13% TOC and > 12m thick) • PotenYal reservoir: J3-K1, K1dz1, K1dz2 • PotenYal traps in syn-ri clasYcs sourced and sealed by lacustrine shales • Soviet oil exploraon since the 1950s • >40 wells drilled: 700-1800 m deep • 20 wells with hydrocarbon shows in K1dz1 • No commercial producYon • No reliable well data preserved! • BP studied basin in 1990 • Regional geophysical work conducted 1986-1991 • 2008 seismic survey: 458 km • 2010 seismic survey: 466 km • Gravity and MagneYc study in 2010 Franconia Nyalga, Kherulen sub-basin 2010 Seismic Survey: 466 km Kherulen River Field Work Area 8 transtensional/transpressional sub-basins Franconia 2 main orientations Shiree Kherulen 50 km Genghis Khan Nyalga burial site? Geometry 2 main orientations: conjugate shears Franconia same boOom fill: simultaneous basin iniYaon Kherulen 50 km Nyalga basin: all type locaons in East Gobi basin Nyalga Stragraphy No regional East Gobi basin Seal Reservoir, K2 Seal K2 Source, Reservoir, Seal K1 K1 J3-K1 Reservoir? J3-K1 Prost (2004) Compiled from BP (1991) Franconia Franconia Kushuur! What are we eang? Kherulen sub-basin northern basin shoulder: Franconia refolded anYcline indicates Y 2010 seismic grid K1dz2 sinistral shear & field work area Y coal seam K1dz2 in K1dz2 Y Y 209 216 Y 214 215 K2 211 212 213 210 201 207 208 225 205 206 202 K1dz1 20 km 203 204 J3-K1 [potenYal reservoir] exposed on shoulders Standing on horst of Pz sediments in central Kherulen sub-basin: Franconia view northwest towards graben shoulder Basin shoulder: J3-K1 early ri~ volcanics (no sandstones as in East Gobi basin) K2 Pz Same horst of Pz sediments in Kherulen sub-basin, looking SE Franconia No porosity! J3-K1 Tsagaantsav fm. base of connental syn-riX secon: Franconia early syn-ri~ andesite tuff breccia on northern Kherulen sub-basin shoulder as part of a bimodal alkaline volcanic suite (basalt, andesite, rhyolite) extruded on the basin floor Lateral extent is unconstrained Poor reservoir (BP, 1991) K2 Early syn-ri~! J3-K1 base of connental syn-ri secon: >>630 m of andesiYc rocks on basalt Franconia N S K2 4345 Franconia N S Khumultei upli~ (horst): J3-K1 volcanics K2 4347 1 Min. Video: on Khumultei Upli~ Khumultei Upli~ (horst), Kherulen sub-basin: J3-K1 andesite
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