PREREQUISITE FOR POSSIBLE EXPANSION OF UNCONVENTIONAL RESERVOIR IN THE LOWER TRIASSIC SEDIMENTS OF THE EAST MANYCH TROUGH

OF THE NORTH CAUCASIAN OIL AND GAS AREA (according to the results of comparison with the clay-carbonate formation Pearsall, USA)

B.A. Solovyov, S.P. Levshounova

Federal State Unitary Enterprise «All-Russian Research Geological Oil Institute»

VNIGNI, 2014

Scheme of distribution of lithofacial complexes of Neftekumsk Suite In the Northeastern Part of the East Ciscaucasian Oil and Gas Area

1 - the boundary between the shallow sediments (A) and deep (B) shelf; 2 - border of development of facial complexes of shallow shelf: A-1 - carbonate platform, A-2 bordering, A-3 - edge, A-4 - organogenic structures inside the lagoon and A-5-of the lagoon; 3 – boundaries of thinning of the sediments of Neftekumsk Formation; 4 wells (optional); 5-6 deposits: 5 oil; 6 oil and gas; Lithological complexes of shallow shelf: 7-bioherm limestones and organogenic-detrital; 8-dolomite, limestone organogenic-detrital; and interlayers of clay and marl; 9 - inequigranular limestones with interbedded organogenic-detrital ones and clays; Lithological complexes of deep shelf: 10- thin-bedded carbonate-clay deposits. List of oil and gas deposits in the sediments of Neftekumsk suite: 1-Ozernoye, 2-Garunovskoye, 3-Solonchakovoye, 4-Tsentralnoye, 5-Rifovoye, 6-Razdolnoye, 7-Talovskoye, 8-Kulinskoye, 9-Nakazuhskoe, 10-Yubileynoye, 11- Severo-Yubileynoye, 12- Vostochno-Yubileynoye, 13-Yuzhno-Talovskoye, 14-Kazbekovskoye, 15-Kumuhskoe, 16-Yuzhno-Kumuhskoe, 17-Ravninnoye.

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1-southern boundary of Karpinsky Ridge; 2-boundary of Kochubeevsky ledge; 3, 5-isohypses of the surface of sediments: 3-Neftekumsk, 4-Neftekumsk -Kultay, 5-Olenyek-Anizy, 6-faults established and expected, 7-boundary of thinning out of Neftekumsk-Anizy carbonate deposits; 8,9 - fields and relevant topic numbers according to the list: 8-oil, 9-oil and gas, 10-wells (optional), 11,12-lines of sections: 11-geological, 12-seismic.

List deposits in the sediments of Neftekumsk Suite: 1 Ozernoye, 2 Garunovskoe, 3-Solonchakovoye, 4 Tsentralnoye, 5Rifovoye 6-Razdolnoye , 7- Talovskoye, 8- Kulinskoye, 9- Nakazuchinskoye, 10- Yubileynoye, 11- Severo-Yubileynoye , 12 Vostochno- Yubileynoye, 13 Yuzhno- Talovskoye 14-Kazbekovskoye, 15 Kumuhskoye, 16 Yuzhno- Kumuhskoye, 17 Ravninnoye.

THE STRUCTURAL MAP OF THE LOWER-MIDDLE TRIASSIC SEDIMENTS IN THE NORTH-

EAST PART OF THE EAST PRECAUCASIS According to data of Grozneftegeofizika, Tsentrgeofizika and VolgogradNIPIneft

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THE SCHEMATIC GEOLOGICAL SECTION OF THE TRIASSIC DEPOSITS

(THE KARPINSKY RIDGE-KOCHUBEY UPLIFT)

1- limestones, 2- limestone clay, 3- dolomites, 4- limestones and dolomites interbedded with marls, 5- organogenic constructions, 6- argillites, 7- marls, 8- argillites interbedded with limestones, 9- sandstones, 10- clayey sandstones, 11- sandy-clay deposits, 12- volcanogenic-sedimentary deposits, 13- faults, 14- rocks of the folded Paleozoic complex. 4

SHALE GAS BASINS IN THE UNITED STATES

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Map of the northern part of Gulf of Mexico basin

1) G.A. Gabrielyants. Method of impacting the bottomhole zone of the carbonate reservoir in order to increase the fluid-recoil: an inventor's certificate No. 1579121 / G.A. Gabrielyants, S.P. Levshunova - 1990. The invention patents USA № 2330758, № 4160412.

2) M.K. Kalinko. Geochemical method of oil and gas searching: an inventor's certificate No. 812026 / M.K. Kalinko, S.P. Levshunova - 1980.

3) K.A. Kleschev. The method of prediction and prevention of accidents at drilling of ultra-deep wells: an inventor's certificate No. 2001238 / K.A. Kleschev, S.P. Levshunova - 1991.

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(M.S. BURSHTAR, K.F. RODIONOVA, A.G. MILESCHINA (1972), N.P. GRECHISCHNIKOVA (1984), P.A. KARPOVA (1987),

D.A. MIRZOEVA, L.I. JAPARIDZE (1986), E.M. LANDA (1990), B.A. SOKOLOVA (1989), YU.I. KORCHAGINA (1990),

K.S. SOBORNOVA (2001), V.A. CHAHMACHEVA (2001), L.M. SAVELIEVA (1978), HACKLEY (2012) ET AL.

Formation Lower Triassic sediments of the East Manych Trough of the North Caucasian

Oil and Gas Province

Lower Cretaceous Formation Persoll of the Maverick Basin, South Texas

Content of Organic Matter, %

from 0,3 -0,4 to n (solid bitumens) from 0,17 - 0,47 to n (solid bitumens)

Stage of catagenetic transformation of

Organic Matter

R0=1,16-1,75, MK4-AK11

Main Gas Window

R0=1,2-2,2, MK4-AK12

Main Gas Window

Reservoir properties

Porosity , % <5% 1,6 - 6,7 max 10

Permeability , mD >0,3 0,003 - 0,062

Availability of fractures and microfractures

There are open and closed fractures There are no fractures

Parameter

GEOCHEMICAL CHARACTERISTICS AND RESERVOIR PROPERTIES OF THE PERSOL

FORMATION AND OF CLAY-CARBONATE SEDIMENTS OF THE LOWER TRIASSIC OF THE

EAST MANYCH TROUGH

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OPENED AND CLOSE FRACTURES DISTRIBUTION IN THE LOWER TRIASSIC CLAY-

CARBONATE DEEP-WATER FORMATIONS. WELL # 82 SVETLOYARSKAYA

AT THE EAST MANYCH TROUGH (A.A. KOLODIN, 1981)

Closed fractures Open fractures

Interval, m Rock name Character of filling the fractures Interval, m Rock name Degree of fractures

opening, μ

3702-3713 carbonate clays and marls 5

3761-3788 marls

3922-3928 carbonate argillite

4083-4089 carbonate clays and marls 5 - 25

the smell of oil

4141-4151 argillites and marls strokes of the bitumen along fractures

4181-4187 carbonate clay strokes of the bitumen

4216-4222 carbonate argillite Fractures are filled with calcite crystals

4286-4292 carbonate clays and marls up to 15 with the solid

bitumen

4436-4442 carbonate clays and marls 5

4476-4482 carbonate clays and marls 5

4634-4639 мергель Fractures are filled with calcite crystals 4634-4639 carbonate clays and marls

4728-4734 carbonate clays and marls 5

4807-4813 carbonate clays and marls 5 allocation of pyrite on

the planes

4994-5001 carbonate clays and marls 10

4941-4949 layer of sandstone Fractures are filled with calcite crystals

5188-5194 siltstone Fractures are filled with calcite crystals

5048-5194 metaargillites clots of ore material

OPEN AND CLOSED FRACTURES DISTRIBUTION IN THE CLAY-

CARBONATE DEEP-WATER DEPOSITS IN THE WELL #82

SVETLOYARSKAYA

10

T2an T1

H, m

0

5

10

15

20

25

30

FR

AC

TU

RE

S O

PE

NIN

G, μ

3702-

3713

4083-

4089 4083-

4089

4286-

4292

4436-

4442

4476-

4482 4634-

4639

4728-

4734

4807-

4813

4994-

5001 H, м

5 5 5 5 5 5 5

10

15

25

T2an T1

DISTRIBUTION OF THE OPEN FRACTURES

(WELL # 82 SVETLOYARSKAYA)

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H, m

ZONE OF UNCONVENTIONAL RESERVOIR IN THE CLAY-CARBONATE SEDIMENTS

1-southern border of the Karpinsky Ridge; 2 - the boundary between sediments of shallow and relatively deep shelf; 3 - boundaries of thinning of the sediments of Neftekumsk Suite; 4 - wells (optional); 5-6 - deposits of: 5 - oil; 6 - oil and gas; 7 - shallow shelf area, 8 - region of relatively deep shelf with possible development of unconventional reservoirs.

List of oil and gas deposits in the sediments of Neftekumsk suite: 1-Ozernoye, 2-Garunovskoye, 3-Solonchakovoye, 4-Tsentralnoye, 5-Rifovoye, 6-Razdolnoye, 7-Talovskoye, 8-Kulinskoye, 9-Nakazuhskoe, 10-Yubileynoye, 11- Severo-Yubileynoye, 12- Vostochno-Yubileynoye, 13-Yuzhno-Talovskoye, 14-Kazbekovskoye, 15-Kumuhskoe, 16-Yuzhno-Kumuhskoe, 17-Ravninnoye. 12

Thank you for attention!

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