On September 21, 2012, Quicksilver Resources Inc. ("Quicksilver") entered into an Acquisition and Exploration Agreement (the "SWEPI Agreement") with SWEPI LP ("SWEPI"), a subsidiary of Royal Dutch Shell plc, to jointly develop Quicksilver's and SWEPI's oil and gas interests in the Sand Wash Basin in Northwest Colorado and to establish an Area of Mutual Interest ("AMI") covering in excess of 850,000 acres in the basin.

Pursuant to the SWEPI Agreement, the parties will each assign to the other a 50% working interest in the majority of their acreage in the Sand Wash Basin so that each party will own a 50% interest in approximately 330,000 acres and have the right to a 50% interest in any acquisition within the AMI. In addition, the SWEPI Agreement provides that SWEPI will pay Quicksilver an equalization payment for 50% of the differential in acreage contributed by Quicksilver in excess of the acreage that SWEPI contributes, subject to certain closing and post-closing adjustments pursuant to the SWEPI Agreement.

SWEPI will be the operator of the majority of the lands subject to the SWEPI Agreement, although Quicksilver will continue to operate wells it drilled prior to the SWEPI Agreement and on other designated lands.

The transactions contemplated by the SWEPI Agreement are expected to close before year-end 2012, subject to customary due diligence and other closing conditions.

The SWEPI Agreement contains customary representations, warranties, covenants, indemnification obligations and closing conditions. Subject to certain conditions and exceptions, the SWEPI Agreement may be terminated prior to closing under certain circumstances, including that (a) the parties mutually consent to the termination and (b) the aggregate amount of net mineral acres to be assigned or leased at closing by either the Company or SWEPI is reduced on account of title or environmental defects by more than 25% of the total net mineral acres of that party initially subject to the SWEPI Agreement on its effective date.

The foregoing summary is not intended to be complete and is qualified in its entirety by the SWEPI Agreement, a copy of which is attached as Exhibit 10.1 to this Form 8-K and incorporated herein by reference.

On September 24, 2012, Quicksilver issued a press release announcing the SWEPI Agreement. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

On September 24, 2012, Quicksilver issued a press release providing an update on reduced letter of credit obligations to NOVA Gas Transmission Ltd., a subsidiary of TransCanada Pipelines Limited, in connection with the Komie North pipeline project in the Horn River Basin in British Columbia. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

(d) Exhibits.

Exhibit Number

               Description
    10.1*      Acquisition and Exploration Agreement, dated September 20, 2012,
               between Quicksilver Resources Inc. and SWEPI LP.
    99.1       Press Release dated September 24, 2012.

* Portions of exhibit deleted pursuant to request for confidential treatment. These portions have been furnished separately to the Securities and Exchange Commission.