China Petroleum Resource Classification system Hu ... - CCOP

China Petroleum Resource Classification systemHu YundongBackgroundThe hydrocarbon resources of China were estimated about100 billion tonnes of oil in place and about 50 trillion (10 12 )m 3 of gas in place.As of the end 2002, the measured hydrocarbon in place wereabout 23 billion tonnes of oil and 5 trillion m 3 of gas, theremaining recoverable reserves were 2.5 billion tonnes of oiland 2 trillion m 3 of gas, estimated in Chinese currentestimation standards.BackgroundReserves Activity OrganizationGovernment Registration and RecordMinistry of Land and ResourcesSenior ManagementCorp. UpstreamGovernment Audit (P1 only)Petroleum Reserves OfficeMinistry of Land and ResourcesLocal Reserve ManagementRegional E&P CompanyReserves EstimationReserve Project TeamsRegional E&P Research Institute56Standard SettingStandard SettingIn 1977, the Ministry of Petroleum issued a geologic reserveestimation guideline.In 1982, the Research Institute of Petroleum E&D set upcriteria for oil and gas reserves estimation.In 1984, China National Mineral Reserves Committee wasformed. The study and setting of mandatory criteria for oiland gas reserves estimation was begun.In 1988, China National Standard Bureau adopted andissued the Committee’s criteria.Since 2000, the Ministry of Land and Resource has beenworking on the amendment of the criteria taking intoconsideration of SPE/UNFC definitions.The new criteria will be approved and issued by the NationalStandard Committee this year.78D:/China-Resource-Classification-to-CCOP 2

China Petroleum Resource Classification systemHu YundongBasic Features of Current SystemSketch comparisonBasic Features of Current SystemSketch comparisonChinese Measured Recoverable ReservesProductionSPE Proved SPE Probable P 4Chinese Indicated Recoverable ReservesSPESPE Probable PossibleSPEProvedSPE ContingentResources(P 4+5 )Chinese Inferred Recoverable ReservesSPEProbableSPE PossibleSPE ContingentResources(P 6 )1718ExamplesExamplesMeasured limit inChinese StandardsSEC Estimated:Proved Area 8.6kmP 3LKG2P 3OGIP 1.58 ×10 9 m 3010Reserve 1.11 ×10 9 m 3PROBABLEPOSSIBLE15 P 2 0P P 2 P 3 30 PROVED1015 P 2 10.4mP 1 15P 10P 2 16.1m3 井Chinese Standards:Proved Area 28.8km 2P3 P 2 P 30OGIP 6.41 ×10 9 m 3Reserves 4.49 ×10 9 m 346504750S w (%)Ø(%)LithologyHwExample 2: LKH interpretation—— a gas field in DagangSPE Proved limit — LKGChinese estimated Measuredlimit — middle point of LKGand the top of perforated dryinterval.Example 1: Reserves assignment to different categories—— a gas field in Tarim1920D:/China-Resource-Classification-to-CCOP 5

China Petroleum Resource Classification systemHu YundongCase Study(1)—— E&P Phase and Reserve estimation in a Daqing fieldCase Study(1)—— E&P Phase and Reserve estimation in a Daqing field英 5英 16英 12Regional Reconnaissance1963-1984First well Ying 5 was drilled in1963 with oil traces from thecuttings in five formations;In 1983, Ying 12 discoveredoil with test production 1.1t/d;In 1984, Ying 16 test withCommercial production 5.5t/d.Gas 60230 m 3 /dOil 70.6 t/dGas 1960 m 3 /dOil 77.2 t/dYing19Ha 10General Exploration1985-19952D seismic in selected area;Two preliminary wells in thefavorable traps;Interest formations in lowerCretaceous ( K 1 n~K 1 q 4 );Complex oil and watersystem with no common fluidcontacts in the upper andmiddle interest formations;Inferred Geological Reserves1260 ×10 4 t in an area 40 km 2 .2930Case Study(1)—— E&P Phase and Reserve estimation in a Daqing fieldCase Study(1)—— E&P Phase and Reserve estimation in a Daqing field英 52Reservoir Appraisal(Exploration Appraisal)1996-2001Re-interpretation all the oldwellsand drill new wellsfocused on FY zones ( K 1 q 3-4 );12 wells with commercialproductions;In 2000, New discoveries fromthe upper zones (K 1 qn 1+2 ) inthe west belt along the river.In 2001, Inferred GeologicalReserves 7621×10 4 t in an area290 km 2 was estimated in FY .Reservoir Appraisal(Exploration Appraisal)2002In the early 2002, IndicatedGeological Reserves 6543×10 4 t in an area 170 km 2 wasestimated in 7 formations.3132D:/China-Resource-Classification-to-CCOP 8