Quantifying immobile and producible reservoir fluids

8) A method comprising:

• a) obtaining a sample of core from a reservoir;
• b) trimming said core to produce trimmings and a remnant of core (hereinafter core);
• c) obtaining gas injection porosity from a portion of said core;
• d) acquiring simultaneous nuclear magnetic resonance (NMR) relaxation time in longitudinal (T1) and transverse (T2) directions (NMR T1-T2) from a portion of said core;
• e) obtaining core minerology data from said trimmings to determine a level of smectite in said core and performing steps f) and i) if said trimmings have 0 to <5% smectite, but performing steps g), h), and i) if said trimmings have ≥5% smectite;
• f) obtaining closed retort data from a portion of said core at Temp 1 and Temp 2, wherein Temp 1 is a temperature where mobile water is emitted from said core and Temp 2 is a temperature where bound water and light oils are emitted from said core;
• or
• g) soaking a portion of said core in D2O and performing time-lapse NMR on H2O/D2O exchange in said D2O soaked core to separate and quantify producible water from immobile water;
• h) obtaining closed retort data on a portion of said core at Temp 2;
• and
• i) integrating core data to separate and quantify a volume of producible water, capillary-bound water and clay-bound water, and to separate and quantify a volume of producible hydrocarbons and immobile hydrocarbons.

10) A method comprising:

• a) obtaining a sample of core from a reservoir;
• b) trimming said core to produce trimmings and a remnant of core (hereinafter core);
• c) obtaining gas injection porosity from a portion of said core;
• d) acquiring simultaneous nuclear magnetic resonance (NMR) relaxation time in longitudinal (T1) and transverse (T2) directions (NMR T1-T2) from a portion of said core;
• e) obtaining total organic carbon and/or rock eval pyrolysis data from a portion said trimmings;
• f) obtaining core minerology data from a portion of said trimmings to determine a level of smectite in said core and performing steps g), j) and k) if said trimmings have 0 to <5% smectite, but performing steps h), i), j) and k) if said trimmings have ≥5% smectite;
• g) obtaining closed retort data from a portion of said core at Temp 1 and Temp 2, wherein Temp 1 is a temperature where mobile water is emitted from said core and Temp 2 is a temperature where bound water and light ends are emitted from said core;
• h) soaking a portion of said core in D2O and performing time-lapse NMR on H2O/D2O exchange in said D2O soaked core to separate and quantify producible water from immobile water;
• i) obtaining closed retort data on a portion of said core at Temp 2;
• j) crushing, cleaning and drying a portion of said core or said trimmings to obtain total porosity data;
• and
• k) integrating data using multiphysics simulations obtained from any performed steps from c) to j) to separate and quantify a volume of immobile water and producible water and a volume of immobile hydrocarbons and producible hydrocarbons.

12) A method comprising:

• a) obtaining a sample of core from a reservoir;
• b) trimming said core to produce trimmings and a remnant of core and dividing said core into at least half-1 and half-2;
• c) obtaining core minerology data from a first portion of said trimmings to determine a level of smectite in said core and obtaining Rock-Eval total organic carbon (TOC) from a second portion of said trimmings;
• d) obtaining gas filled porosity from said half-1 and said half 2 to obtain a gas volume in said core;
• e) acquiring simultaneous nuclear magnetic resonance (NMR) relaxation time in longitudinal (T1) and transverse (T2) directions (NMR T1-T2) from said half-1 and said half 2 to quantify volume(s) of one or more of producible water, capillary-bound water, clay-bound water, producible hydrocarbons, and immobile hydrocarbons;
• f) obtaining closed retort data on said half-1 to quantify volume(s) of one or more of producible water, capillary-bound water, clay-bound water, and producible hydrocarbons:
• i) at Temp 1 and Temp 2 if said core has no smectite, wherein Temp 1 is a temperature where producible water and capillary-bound water are emitted from said core and Temp 2 is a temperature where clay-bound water and light ends are emitted from said core;
• or
• ii) at Temp 2 if said core has significant smectite (≥5%);
• g) soaking said half-2 in D2O and performing time-lapse NMR on H2O/D2O exchange in said D2O soaked half-2 to obtain a volume of clay-bound water;
• h) obtaining closed retort data at Temp 2 on said soaked half-2 to obtain a volume of total water and a volume of producible oil;
• i) crushing, cleaning and drying a portion of said half-1 from step f) and said soaked core half-2 from step h) to obtain a total fluids volume in said core;
• j) integrating half-1 and half-2 data from steps d) through i) using multiphysics simulations to separate and quantify a volume of:
• producible water, capillary-bound water, and clay-bound water and to separate and quantify a volume of immobile hydrocarbons and producible hydrocarbons and using S2 from said Rock-Eval TOC as reference in comparison to immobile hydrocarbon porosity.