Method of drilling a subterranean geological formation with date based drilling fluid preliminary class

Patent metadata

Field	Value
Publication number	US-12146094-B2
Application number	US-202418616632-A
Country	US
Kind code	B2
Filing date	Mar 26, 2024
Priority date	Mar 10, 2023
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

A drilling fluid composition includes an aqueous base fluid, 0.01 to 10 wt. % of a date palm leaves extract (DPLE), 1 to 10 wt. % of clay particles, and 0.01 to 1 wt. % of a base, where each wt. % based on a total weight of the drilling fluid composition. The DPLE is homogenously disposed on surfaces of the clay particles. The clay particles disposed with the DPLE are present in the drilling fluid composition in the form of a composite. A pellet made from the clay particles treated with the DPLE has a swelling value at least 75% less than a swelling value of the pellet in an aqueous composition that does not contain the DLPE. A method of making the drilling fluid composition.

First claim

The invention claimed is:

1. A method of drilling a subterranean geological formation, comprising:
drilling the subterranean geological formation to form a wellbore therein;
injecting a drilling fluid composition into the wellbore during the drilling and circulating the drilling fluid composition in the wellbore; and
recovering a product stream from the subterranean geological formation,
wherein the drilling fluid composition comprises:
an aqueous base fluid;
2 to 5 wt. % of a date palm leaves extract (DPLE);
4 to 8 wt. % of sodium bentonite particles; and
0.01 to 0.5 wt. % of a base;
each wt. % based on a total weight of the drilling fluid composition;
wherein the DPLE is homogenously disposed on surfaces of the sodium bentonite particles;
wherein the sodium bentonite particles disposed with the DPLE are present in the drilling fluid composition in the form of a composite; and
wherein a pellet made from the sodium bentonite particles treated with the DPLE has a swelling value at least 75% less than a swelling value of the pellet in an aqueous composition that does not contain the DLPE.

2. The method of claim 1 , wherein the DPLE of the drilling fluid composition is prepared from Saudi Arabia date palm tree leaves.

3. The method of claim 1 , wherein the DPLE of the drilling fluid composition comprises at least one compound selected from the group consisting of a cellulose compound, a hemicellulose compound, a lignin compound, an extractive substance, and an inorganic salt.

4. The method of claim 1 , wherein the DPLE enhances the hydrophobicity of the clay particles after contacting.

5. The method of claim 1 , wherein the base of the drilling fluid composition comprises one or more of an alkali hydroxide, an alkali carbonate, an alkali bicarbonate, caustic soda, an alkaline earth metal hydroxide, an alkaline earth metal carbonate, and an alkaline earth bicarbonate.

6. The method of claim 1 , wherein the base of the drilling fluid composition is sodium hydroxide.

7. The method of claim 1 , wherein the aqueous base fluid of the drilling fluid composition comprises one or more additives selected from the group consisting of an emulsifier, an anti-foaming agent, a fluid-loss additive, a viscosity modifier, a shale stabilizer, an alkali compound, a bridging agent, and a weighting agent.

8. The method of claim 7 , wherein:
the emulsifier is selected from the group consisting of sodium lauryl sulfate (SLS), sodium dodecylbenzene sulfonate (SDBS), polyacrylate, tall oil fatty acid, and fatty amidoamine;
the anti-foaming agent is selected from the group consisting of polydimethylsiloxane, fatty acid ester, silicon dioxide, and vegetable oil;
the viscosity modifier is selected from the group consisting of a clay, a saccharide, a polysaccharide, a cellulose, an acrylate polymer and copolymer, and a polyvinyl polymer and copolymer;
the fluid-loss additive is selected from the group consisting of a starch, a starch derivative, a cellulose, and a cellulose derivative;
the shale stabilizer is selected from the group consisting of a sodium salt, and a sulfonated asphalt;
the alkali compound is selected from the group consisting of caustic soda and soda ash;
the bridging agent is selected from the group consisting of sodium borate, boric oxide, calcium carbonate, and magnesium oxide; and
the weighting agent is selected from the group consisting of barite and hematite.

9. The method of claim 1 , wherein the drilling fluid composition has a pH in a range of 8 to 10.

10. The method of claim 1 , wherein the drilling fluid composition has a capillary suction time in a range of 50 to 500 seconds.

11. The method of claim 1 , wherein the drilling fluid composition has a zeta potential in a range of −50 to −5 millivolts (mV).

12. The method of claim 1 , wherein the drilling fluid composition has a fluid loss in a range of 5 to 20 milliliters (mL) according to ASTM D5891.

13. The method of claim 1 , wherein the wellbore is at least one of a vertical wellbore, a deviated wellbore, a multilateral wellbore, and a horizontal wellbore.

14. The method of claim 1 , wherein the subterranean geological formation comprises at least one selected from the group consisting of a shale formation, a tar sands formation, a coal formation, a clay formation, and a conventional hydrocarbon formation.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Saleh Tawfik Abdo
• Rana Azeem
• Murtaza Mobeen
• Kamal Muhammad Shahzad
• MAHMOUD Mohamed

Classifications

• C09K2208/12

  Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating · CPC title

• C09K8/206 Primary

  Derivatives of other natural products, e.g. cellulose, starch, sugars · CPC title