The hydrocarbon reserves calculation is the basis for planning of field development. Nowadays, such data as initial reservoir pressure, oil/gas/water contact definition, formation fluid properties, initial production rate and some other parameters needed for hydrocarbon reserves calculation can be obtained during cased hole testing. This requires fair amount of materials and lots of time. Certain well tests can extend up to a year or more, and are fraught with high costs. The wireline formation test has long been applied in exploration worldwide. During the wireline formation test the operator can receive real-time geological information, which is also required for hydrocarbon reserves estimation and conversion to B1 and C1 reserve categories. The efficiency of this method allows taking measurements with high density over a short time. As a result, geological data obtained by this method is more detailed and informative than that produced from the cased hole test. The time duration of well test program can be significantly reduced. Cost and time saving can be beneficial for exploration in remote regions where logistics and drilling team support issues can become particularly sensitive. It can also speed up decision-making on additional exploration in the fields under development. However, the wireline formation test cannot substitute the casing well test; this data cannot be self-sufficient for hydrocarbon reserves calculation in common practice. Yet, the regulation for acquiring and applying this data can allow the common practice to be changed and full-scale application of wireline formation test data in the context of reserves categorization.
References
1. Abdrakhmanova L.G., Akhmedsafin S.K., Blinov V.A. et al., Metodicheskie rekomendatsii po obosnovaniyu podschetnykh parametrov zalezhey v terrigennykh otlozheniyakh po dannym GIS i novym metodam GDK-OPK pri postanovke na uchet i perevode UVS v promyshlennye kategorii zapasov (Methodological recommendations for substantiating the calculated parameters of deposits in terrigenous deposits using well logging data and new methods of hydrodynamic logging and formation testing when registering and transferring hydrocarbons to industrial categories of reserves), Moscow, 2015, 64 p.
2. MDT Modular Formation Dynamics Tester, Schlumberger, 2002.
3. Khisamov R.S., Suleymanov E.I., Fakhrullin R.G. et al., Gidrodinamicheskie issledovaniya skvazhin i metody obrabotki rezul’tatov izmereniy (Hydrodynamic testing of wells and methods for processing measurement results), Moscow: Publ. of VNIIOENG, 1999, 227 p.
4. Metodika rascheta dobyvnogo potentsiala skvazhin (Methodology for calculating the production potential of wells), Ufa: Publ. of YuganskNIPIneft’, 2001, 85 p.
5. Metodicheskie rekomendatsii po podschetu zapasov nefti i gaza ob’emnym metodom. Otsenka kharaktera nasyshchennosti po dannym GIS (Guidelines for the calculation of reserves of oil and gas by volumetric method. Assessment of the nature of saturation according to well logging): edited by Petersil’e V.I., Poroskun V.I., Yatsenko G.G., Moscow – Tver: Publ. of VNIGNI, 2003, 261 p.
